Honda CRF300L • 2021–2027

CRF300L Rider Guide

Build a CRF300L that fits you and the miles ahead. Find the right suspension, a seat you can spend the day on, useful protection and matched performance parts—with a clear order for the work.

Shop CRF300L Parts Find Your First Upgrade

All Honda CRF Rider Guides

Start With the Exact Bike

CRF300L years, ABS and market fitment

This guide covers the standard CRF300L from 2021 through 2027. Use the 2025-onward application for the 2027 carryover, while keeping earlier fork and electrical differences in the parts selection. The CRF300LS and CRF300L Rally need their own model-specific checks.

Bike / year	What changes the parts choice
2021–2022 standard CRF300L	Use the early fork-piston option where specified. The early EJK and featured SpeedoDRD belong to the 2021–2024 electrical application. Identify ABS and country separately.
2023–2024 standard CRF300L	K-Tech’s fork piston selection moves to its 2023-current version. Fuel-controller and SpeedoDRD selection remains in the early 2021–2024 group.
2025–2027 standard CRF300L	Use the late EJK application. Honda’s 2025 U.S. update introduced LED headlight/turn signals, revised suspension and standard ABS. Confirm signal accessories and connector applications; the early SpeedoDRD does not fit.
ABS versus non-ABS	Check the actual bike and country specification. The featured IMS 2.5-gallon tanks expressly exclude ABS, regardless of the broad year title. Do not use a non-ABS tank on the later U.S. standard-ABS bike.
CRF300LS	Factory lower model with a different chassis-height arrangement. Confirm springs, fork internals, shocks and lowering parts specifically for LS. A standard bike with a low seat or low rear shock is not automatically an LS.
CRF300L Rally	Different tank, seat and bodywork change many accessory applications. The complete Seat Concepts seat, standard Flatland radiator guard and its tank bracket here are not Rally parts.
Non-U.S. or modified bike	Supply country, model code and changed parts. The featured OEM-valve cylinder head is USA-only and does not fit Canadian-market or other non-USA bikes. Identify any changed forks, tank, bars or wiring.

Model reference: Honda’s 2025 U.S. CRF300L specifications and features. The year groups above also reflect the application choices on the linked suspension and electrical products.

Before ordering: tell us year, country, standard/LS/Rally, ABS status and existing modifications. For suspension, add rider weight, riding gear, luggage and terrain. If 2027 is missing from a product’s selector, contact us for the correct configuration instead of selecting an incorrect year.

Know Your Starting Point

A compact stock-bike reference

Use this as a labeled reference for the 2025 U.S. standard CRF300L, then confirm the equipment on your own bike. It is not a replacement for the exact owner’s manual.

Item	Honda reference	Why it matters
Engine / gearbox	286cc liquid-cooled single / six-speed manual	Select CRF300L engine and clutch parts; do not substitute another CRF’s ECU or internal components.
Seat / clearance	34.7-inch seat / 11.2-inch ground clearance	Seat shape, sag and load affect real ground reach. Chassis lowering can reduce obstacle clearance.
Suspension travel	10.2 inches front and rear	Plan spring support, damping and geometry as a system. A suspension kit is not automatically a travel increase.
Tires / wheels	80/100-21 front / 120/80-18 rear	Confirm installed sizes, ratings and tube requirements when selecting tires and repair supplies.
Final drive	#520 chain; 14-tooth front / 40-tooth rear	A reference for the gearing comparison below; inspect what is actually installed.
Fuel / curb weight	2.1 US gallons / 311 lb	The stated 0.5-gallon reserve is included in tank capacity. Added fuel, racks and luggage increase the load.

Source: Honda U.S. 2025 CRF300L specification. These figures describe the 2025 U.S. stock reference. Confirm the installed equipment and exact market specification on your bike.

Spend Where You Will Feel It

What should you upgrade first?

A useful CRF300L build starts with the problem that limits the ride. Service the bike, make the controls fit, then work through support, protection and carrying needs before planning engine changes.

What you notice	First check	Best place to start
Too much sag, repeated bottoming or poor control	Tire pressure, suspension condition and sag with the actual rider/load.	Compare spring, damping and complete-package routes. Match both ends before chasing engine output.
Seat discomfort after an hour	Where the pressure occurs and whether the problem is width, shape or seated room.	Choose the appropriate Seat Concepts style; lower is not automatically more comfortable.
Ground reach limits confidence	Correct sag, boots, stopping technique and seat shape.	Compare low seat, low shock and lowering-link approaches before committing to geometry changes.
Rocks, drops and damaged levers	The routes you ride and the areas already exposed.	Plan one skid plate and compatible radiator guard, then handguards with the shields you want.
More luggage or longer days	Trip load, fuel stops, rear-rack limits and service due dates.	Start with the rear rack, load planning and suspension appropriate to the finished load.
Need different low-speed response	Clutch adjustment, running condition and the gearing actually fitted.	Compare gearing and throttle-cam feel before choosing a closed-course performance build.

A good first cart: buy service parts for the work due, one protection combination for the terrain, and the rider-fit item that addresses your biggest comfort problem. If the suspension is the limitation, a matched front/rear package can make the buying decision simpler. Leave room in the plan for installation and setup.

The Most Important Setup Decision

CRF300L suspension: choose the right approach

Spring rate supports the load. Preload adjusts sag and the operating position. Damping controls movement. Decide which needs attention, and have the front and rear set up for rider, gear and normal luggage together.

Approach	What it changes	What to buy together
Race Tech spring addition	Adds a spring in the left damping leg and retains the original right-leg spring.	The spring kit can form part of a planned Gold Valve fork setup. The added rate is not the total fork rate.
K-Tech spring replacement	Replaces the existing right-leg spring.	Pair the single spring with the correct year-specific piston kit when valving also needs attention.
K-Tech 20IDS conversion	Replaces the cartridge arrangement and includes its required springs.	Choose 20IDS as a separate front-end approach with an appropriate rear shock. Do not add the above spring/piston kits.
Complete standard-height package	Supplies the listed fork components and rear shock together.	Choose one: all-K-Tech, K-Tech/Race Tech or all-Race Tech. Installation and final setup still need arranging.
Individual rear shock	Changes rear support and damping without rebuilding the fork by itself.	Compare K-Tech EVO weight/height variants or confirm the Öhlins application. Match the front setup separately.
Low rear-shock package	Lowers the rear through the shock choice; featured front components remain standard height.	Choose a low package only with a plan for balance, clearances and stand lean. It is not an equal front/rear lowering kit.

Use the right weight entry. Some forms explicitly ask for rider weight without gear. Enter exactly what they request and send gear, tools and luggage weights separately. Do not silently put your loaded total in a no-gear field. Near a weight-band boundary, or with changing luggage loads, have us review the complete setup.

Record the baseline before changing parts: rider/load, springs, preload, available damping settings and how the bike behaves on a familiar route. Measure sag correctly, change one setting at a time and keep notes. Excessive preload is not a substitute for a suitable spring; lowering the bike by using excessive sag compromises the setup.

Reach, Comfort and Geometry

Low seat or lower suspension?

These choices solve different problems. Start with correct sag and riding position; then choose the smallest change that achieves useful ground reach without sacrificing more clearance or comfort than necessary.

Option	What changes	What to consider
Low complete seat	Rider sits lower; suspension height and travel stay as configured.	The featured Low Seat Concepts seat is approximately one inch lower. Less seat height can mean a tighter seated knee angle.
Standard, Tall or XL seat	Changes the seated platform, room or width.	Choose for the pressure point and riding position. A wider seat can spread support but may affect reach to the ground.
Low rear shock / package	Changes rear ride height through the shock.	The K-Tech low package and mixed low package keep standard-height fork components. Have an installer plan front/rear balance.
Kouba link	Changes rear geometry and suspension leverage.	Listed standard-model rear drop is about 1.75 inches. Verify travel, clearance and spring/setup suitability; do not stack with a low shock by default.
Factory CRF300LS	Honda’s lower model has its own suspension-height arrangement.	Honda’s 2025 U.S. reference lists a 32.7-inch seat. Do not transfer standard-model suspension internals or lowering amounts solely from the shared engine name.
Side-stand change	Supports the finished motorcycle at a suitable lean.	Evaluate the adjustable side stand after final height and sag are established. Preserve switch operation.

Factory LS reference: Honda’s 2025 U.S. CRF300LS specification. Listed seat and rear-lowering figures measure different things; they should not be added together to promise a final seat height.

Plan one chassis-lowering approach. A low seat can be considered alongside a carefully planned suspension setup, but combining a low shock with a lowering link requires a separate engineering and clearance assessment. Give the installer the actual parts, rider load and target reach; do not copy another bike’s fork-tube position.

Make the Cart Work as a System

Package contents and duplicate-purchase checks

A complete package can simplify the purchase, but it does not mean every accessory or installation step is included. Use this check before adding individual parts.

If you choose…	Already included / important limit	Do not add by default
All-K-Tech standard or low package	EVO shock, K-Tech piston kit and single spring; low version lowers the rear only.	A second shock, piston kit or single spring.
Mixed K-Tech / Race Tech package	K-Tech shock plus Race Tech spring and Gold Valve kits.	A second Gold Valve/spring kit or an all-K-Tech package.
Race Tech complete package	G3-S shock, fork spring and Gold Valve kits; reservoir optional.	Another shock or an assumed included reservoir.
20IDS cartridges	Cartridges and required springs.	Separate Race Tech/K-Tech spring or piston kits for the same conversion.
RS-12 performance package	Full exhaust, K&N air filter and year-matched EJK.	A second full exhaust, slip-on, air filter or EJK unless intentionally buying a spare.
One clutch route	TorqDrive manual pack, RadiusX system and five-spring conversion are alternatives.	Two different clutch systems for the same installation.
Complete OEM service kit	Oil, oil filter/gasket/washer, OEM air filter and coolant as listed.	Separate oil kit or OEM air filter unless intentionally needed.
Current Flatland radiator guard	Updated larger-tank bracket is already included on current production.	An extra replacement bracket without checking the existing guard.
Seat / mirrors / handguards	Complete seat; one mirror side per kit; plastic handguard shields optional.	Foam/cover parts for a complete seat, only one kit for a mirror pair, or both shield styles.

Purposeful Parts for Your CRF300L

CRF300L parts and upgrade guide

Browse by the problem you want to solve. Package contents, alternatives and year-specific details stay beside each selection so you can build a compatible cart.

Suspension Components & Packages Seat, Handguards & Controls Lowering & Ground Reach Engine & Radiator Protection Luggage & Accessory Power Final Drive & Calibration Closed-Course Exhaust, Intake & Fueling Clutch Choices Closed-Course Fuel Tanks Cylinder Heads & Engine Builds Maintenance Essentials Closed-Course Tail Option

Suspension Components & Packages

Build the front and rear together.

Choose one coherent spring-and-damping approach. The complete packages supply components; professional fork installation, setup and any additional service parts still need planning.

2021–2027 • select fork yearMatched front + rear

K-Tech Complete Suspension Package

Address spring support and damping at both ends with a complete component package for the standard-height CRF300L.

Includes a K-Tech EVO rear shock, fork piston kit and replacement fork spring matched to the selected rider weight.
The fork kit separates 2021–2022 from 2023 onward. Enter weight without gear where requested, and tell us about riding gear and luggage separately.
Fork installation and setup are additional work. If your year is absent from the selector, contact us for the correct configuration. Custom packages cannot be canceled, returned or exchanged after shipment.

Configure the K-Tech Package

2021–2027 • standard heightMixed-brand package

K-Tech Shock + Race Tech Fork Package

Pair a K-Tech EVO rear shock with Race Tech’s fork spring and Gold Valve components when this is the front-end approach you prefer.

Includes the rear shock, Race Tech fork spring kit and Gold Valve kit. Select the offered rider-weight band and supply the model year.
An alternative to the all-K-Tech package. Its Race Tech spring adds support in the damping leg; K-Tech’s single spring replaces the existing spring.
Plan professional installation and setup for rider, gear and luggage. Custom packages cannot be canceled, returned or exchanged once shipped.

Configure the Mixed Suspension Package

2021–2027 • custom setupCustom shock route

Race Tech Complete Suspension Package

Choose the Race Tech route for a G3-S rear shock and Race Tech fork upgrades specified around your riding.

Includes the G3-S shock, fork spring kit and Gold Valve kit. Supply rider weight, ability and riding type accurately.
A remote reservoir is optional. Discuss the configuration and current production schedule before ordering.
Arrange professional fork work and setup. The custom order cannot be changed, canceled or returned once the build has begun.

Build the Race Tech Package

2021–2027 • stock fork layoutAdd a spring

Race Tech Fork Spring Kit

A focused spring-support change for a stock-layout fork when rider weight and use call for more support.

Adds a spring and adapter to the left damping leg while retaining the original right-leg spring.
The added spring’s rate is not the total combined fork rate. Use the correct Race Tech application and setup information to choose it.
Springs do not replace a valving upgrade. Do not combine this addition with a K-Tech replacement spring without a specialist calculating the complete spring arrangement.

Choose the Race Tech Spring Kit

2021–2027 • confirm forkImprove fork damping

Race Tech Fork Gold Valve Kit

A valving route when fork damping needs more attention than a spring-only change can provide.

This is a valving kit. Fork springs, a rear shock and complete forks are separate unless you choose a package containing them.
Match damping to the actual springs, rider, load and terrain. Have a qualified suspension technician install and set up the kit.
Already choosing the Race Tech or mixed package? Its Gold Valve kit is included; do not add a second one.

View the Gold Valve Kit

2021–2027 • stock spring legReplace a spring

K-Tech Single Fork Spring

Replace the spring in the existing spring leg when its rate does not support your normal riding load appropriately.

One replacement for the right-leg spring. It does not add a spring to the left damping leg.
The form uses rider weight without gear. Supply gear and luggage information separately when asking for a complete setup recommendation.
Already included in the all-K-Tech package. Not an extra required purchase with that package or spring-inclusive 20IDS cartridges.

Select the K-Tech Fork Spring

2021–2022 / 2023 onwardYear-specific valving

K-Tech Fork Piston Kit

Upgrade the original fork’s damping assemblies while retaining an appropriate spring arrangement.

Select the correct version: 2021–2022 or 2023-current. Identify any previously changed fork internals first.
Springs and complete forks are separate. This kit is already included in the all-K-Tech suspension packages.
Installation needs a trained suspension professional and appropriate tools. No cancellation, return or exchange after shipment.

Select the Correct Fork Piston Kit

2021–2027 • specialist setupAdjustable cartridge route

K-Tech 20IDS Fork Cartridges

A more comprehensive front-suspension conversion with external adjustment for developing the setup.

Includes cartridges and the required springs. Compression, rebound and spring-preload adjustment are described.
An alternative to the spring-and-piston approaches. Do not also order their separate fork springs or valving kits for this conversion.
Specialist work and tools are required, including fork-lug disassembly. Confirm the fork and rear-shock pairing. No cancellation, return or exchange after shipment.

Discuss a 20IDS Cartridge Setup

Early application • confirm later yearsReservoir shock alternative

Öhlins STX46 Rear Shock

A reservoir-equipped rear-shock alternative with external damping adjustment for a confirmed application.

Compression and rebound adjustment are described, with tool-adjusted preload. Confirm the spring for your normal riding load.
The detailed application names 2021–2023 while the broader listing reaches later years. Have us resolve the exact year and specification before ordering.
Pair with an appropriate fork setup. This replaces a rear shock; it is not an extra part for a complete suspension package. Check current availability.

Confirm Öhlins Shock Fitment

Individual Rear-Shock Options

K-Tech EVO: choose weight and height

For a shock-only purchase, choose one rider-weight and height combination below. The EVO provides rebound and preload adjustment. A complete suspension package above already contains its specified rear shock.

Listed rider-weight band	Standard rear height	Low rear height
65–80 kg / approx. 145–175 lb	View standard-height shock	View low rear shock
80–95 kg / approx. 175–210 lb	View standard-height shock	View low rear shock
95–110 kg / approx. 210–245 lb	View standard-height shock	View low rear shock Confirm low-version weight band before purchase.
110–125 kg / approx. 245–275 lb	View standard-height shock	View low rear shock

Confirm the finished specification. The low 95–110 kg listing contains conflicting pound values; have us confirm that selection. Weight ranges are the product’s approximate bands, not a universal calculation for rider plus luggage. Tell us about gear and cargo separately. The low shock’s resulting drop is not stated here. These shocks cannot be canceled, returned or exchanged after shipment, and express shipping is not offered.

Seat, Handguards & Controls

Make the bike fit a full day of riding.

Match the seat to your pressure points and leg room. Set controls in riding gear, then check the complete cockpit at both steering locks.

Standard CRF300L • not RallyComfort, Low, Tall or XL

Seat Concepts Complete Seat

Change support, ground reach or seated room with a complete seat assembly that does not reuse the original pan.

Choose standard Comfort, Low, Tall or XL standard height. The Low option is described as approximately one inch lower; seat shape also affects reach.
XL offers a wider seated platform. A lower seat changes rider position without reducing suspension height, while a taller seat can provide more seated leg room.
Made to order: it cannot be changed, canceled or returned once ordered. Confirm the seat, cover, current build time and required oversize-shipping option first.

Configure Your Complete Seat

2021–2027 • check handlebarHand + lever coverage

Zeta Armor Handguards

A full-wrap handguard option for a compatible stock or Zeta handlebar, with separate shield choices.

Special bar-end hardware is described for the supported bars. Confirm the mounting arrangement if the handlebar has changed.
XC or X3 plastic shields are optional. Choose one style; an optional XC flasher is a separate electrical selection.
Check throttle return, lever movement and full steering clearance. Confirm late-model LED wiring before adding signal accessories.

Choose Handguards & Shields

2021–2027 • check mountsOne side per kit

Doubletake Adventure Mirror 6.0 Kit

A folding mirror with a six-inch arm for finding a useful view around the rider and travel gear.

One side per kit. Order two kits if replacing both mirrors.
Confirm bike-side mounting hardware and clearance with handguards and any screen.
Adjust for useful rear visibility, then check mounting security and control clearance before riding.

View the Mirror Kit

2021–2027 • control reach checkSeated + standing support

Zeta Adventure Footpeg Set

A modular footpeg set with contact-surface options for commuting and standing sections.

Includes both sides, rubber covers, stainless blades, aluminum platforms and mounting bases.
Check shift and rear-brake reach in riding boots after choosing the contact surface.
Verify folding action and secure mounting. Footpegs do not lower the motorcycle’s seat or suspension.

View the Adventure Footpeg Set

2021–2027 • stock housing/cablesMechanical throttle feel

G2 Throttle Tamer

A different throttle-cam response for riders who want finer hand control near the initial opening.

Designed around the stock throttle housing and cables, with a removable end for compatible handguards.
A mechanical throttle tube and cam. It is not a fuel controller and does not add engine horsepower.
Follow the installation instructions and check cable routing, free play and positive throttle return at both steering locks.

View the Throttle Tamer

Lowering & Ground Reach

Improve reach with a complete chassis plan.

The low packages below lower the rear only. Fork components remain standard height, and any lowering needs balance, clearance and side-stand checks.

2021–2027 • rear loweredK-Tech front components

K-Tech Package with Low Rear Shock

A component package for a planned lower-rear-shock arrangement, with the fork setup considered alongside it.

Includes the low rear shock, K-Tech fork piston kit and replacement fork spring. The front components remain standard height.
This does not lower both ends equally. Plan front/rear balance, clearance and side-stand lean with the installer.
Select the fork-year group and weight without gear where requested. Contact us if the year selector is incomplete. No cancellation, return or exchange after shipment.

Discuss the Low K-Tech Package

2021–2027 • rear loweredRace Tech front components

Low K-Tech Shock + Race Tech Fork Package

The mixed-brand package with a low K-Tech rear shock and Race Tech spring-and-valving fork components.

Includes the low shock, Race Tech fork spring kit and Gold Valve kit. These fork components do not lower the front.
Choose this or the low all-K-Tech package. Neither turns a standard CRF300L into the factory CRF300LS configuration.
Have geometry, clearances and stand lean checked. Custom packages cannot be canceled, returned or exchanged after shipment.

Discuss the Low Mixed Package

Standard CRF300L • geometry change1.75-inch listed rear drop

Kouba Lowering Link

A replacement-link route when reach still needs attention after correct sag, rider position and seat options.

The listing describes approximately 1.75 inches of rear lowering on the standard CRF300L. The factory LS has a different stated amount.
Bearings and seals are installed. A link changes leverage and geometry; it is not a softer spring or a complete front/rear lowering kit.
Do not routinely stack it with a low shock. Have the installer verify front/rear balance, tire clearance, travel and stand lean.

Plan a Kouba Lowering Setup

2021–2027 • finished ride heightSupport after lowering

T-Rex Adjustable Side Stand

Evaluate the adjustable stand after the motorcycle’s final suspension height and sag have been established.

Confirm its adjustment range for the completed bike, tires and lowering arrangement.
Check lean on firm, level ground and clearance when retracted. A standard stand can leave a lowered bike too upright.
Retain correct side-stand switch operation and follow the installation instructions. This is a support part, not another lowering component.

Check Adjustable Side-Stand Fitment

Engine & Radiator Protection

Protect the areas your route exposes.

Choose one main skid plate and a compatible radiator guard. Check tank, exhaust, fan and service access as one installation.

Standard CRF300L • 2021–2027Aluminum underside coverage

Flatland Aluminum Skid Plate

Add lower-engine coverage for routes with rocks, ruts and debris.

Constructed from 3/16-inch aluminum with mounting hardware included.
A drain-access opening supports service access. Inspect the underside and mounts during maintenance.
Choose this or the AXP plate as the main skid plate. Confirm clearance with the exhaust and other protection.

View the Flatland Skid Plate

Standard CRF300L • 2021–20276 mm polymer alternative

AXP HDPE Skid Plate

An HDPE alternative for riders who prefer a polymer protective shell beneath the frame and lower engine.

The listing specifies 6 mm HDPE and coverage of the underside frame and lower engine cases.
Compare material, coverage, mounting and service access with the aluminum option.
Inspect for contact, trapped debris and loose mounts after the first ride and after an impact.

View the AXP Skid Plate

Standard CRF300L • not RallyFront + side protection

Flatland Radiator Guard

Support the radiator with an aluminum guard and rear mounting bracket while keeping cooling surfaces accessible for inspection.

Made from 3/16-inch aluminum with mounting hardware included. This is the standard-model #12-79 guard.
Current guards include an updated bracket for larger tanks. Older guards may need the separate replacement bracket; check the actual version before buying both.
Confirm tank, fan and shroud clearance together, especially with a larger tank or later-model bike.

View the Standard-Model Radiator Guard

Already own an older #12-79 guard? The Flatland larger-tank replacement bracket is for the older standard-CRF300L guard, not Rally. Current guards manufactured from August 2024 onward already include the updated bracket. Check the actual bracket before ordering; this part does not add fuel capacity by itself.

Luggage & Accessory Power

Carry what the ride needs.

Keep the load compact and secure. Confirm bike and rack limits, then set suspension for the finished travel load.

2021–2027 • check carried loadA practical luggage base

CRF’s Only Rear Rack

A rear platform for securing a compact load while keeping seat removal practical.

Mounting hardware is included. Keep bag straps clear of the wheel and exhaust.
Accepts a Rotopax mount directly, but the mount and container are separate from this rack-only listing.
Designed around a one-gallon Rotopax container; a larger one is not recommended. Confirm rack and motorcycle limits, counting the rack, mount, container and contents.

View the CRF’s Only Rear Rack

2021–2027 • confirm connectorAccessory wiring foundation

12oClockLabs AUX Power Connector Kit

Connect an appropriate accessory harness through the factory auxiliary connector without splicing into the main harness.

Includes the described connector, pre-attached wires and terminals; listed harness length is 18 inches.
This is not a USB voltage converter, charger or source of additional charging capacity.
Match voltage, current demand and fuse protection to the circuit. Confirm the actual connector, especially on a changed or non-U.S. harness.

View the AUX Connector Kit

Final Drive & Calibration

Choose gearing for the job.

Change ratios deliberately and check chain length, wear and adjustment together. The featured speed calibrator is restricted to early bikes.

2021–2027 • confirm market/shaftChoose the final-drive ratio

JT Front Sprocket

Replace a worn sprocket or deliberately change the gearing to suit the riding.

The selector offers 12, 13 and 14 teeth. Confirm the shaft, retainer arrangement and market application.
Fewer front teeth produce shorter gearing. Consider chain-slider wear, chain length and clearance together.
Inspect the chain and rear sprocket at the same time. Gearing does not increase engine horsepower or guarantee a higher top speed.

Choose the Front Sprocket

2021–2027 • CRF300L hubRear gearing with hardware

Rear Steel Sprocket + Bolt Kit

A steel rear sprocket supplied with the bolt kit specified for the CRF300L hub.

Includes the sprocket and bolt kit. Chain and front sprocket are separate.
Choose from 38, 39, 40, 42, 43, 44 or 45 teeth. More rear teeth shorten the gearing.
Confirm chain length, axle adjustment, guide clearance and the fastening procedure. Do not assume an older CRF250L bolt arrangement.

Choose Rear Gearing & Hardware

2021–2024 onlyCalibrate a supported display

12oClockLabs SpeedoDRD

A speed-signal calibrator for a supported early bike when measured display error follows gearing or tire changes.

Does not fit 2025-current models, including 2027. Confirm the exact electrical application.
Changes the signal going forward; it does not rewrite mileage already stored in the odometer.
Measure the error and follow the instructions. A sprocket change does not automatically mean every ABS or market configuration needs this unit.

Check Early-Model SpeedoDRD Fitment

Closed-Course Exhaust, Intake & Fueling

Match performance parts to the year.

Every product in this section carries closed-course-only terms and excludes street/highway use. For a bike used on public roads, keep an appropriate road-use configuration. Choose the correct early or late EJK and tune for the entire build.

2021–2024 / 2025–2027Matched exhaust + intake + fuel

CRF’s Only RS-12 Performance Package

A coordinated closed-course starting point with the full exhaust, filter and matching fuel controller selected together.

Includes a Yoshimura RS-12 full system, K&N air filter and EJK controller. Select the early or late year group; do not add those same parts again.
2021–2024 uses the early EJK. The 2025–2027 bike needs the late controller. Confirm the final configuration with us if the page shows conflicting year guidance.
Closed-course racing only; not for street or highway use. Developed around U.S. models; confirm other markets, destination restrictions and tuning for the completed build.

Configure the Matched Performance Package

2021–2027 • U.S. application checkComplete exhaust route

Yoshimura RS-12 Full Exhaust System

Choose the complete exhaust route for a closed-course build that needs header and muffler selected together.

An alternative to the slip-on, and already included in the featured performance package.
A carbon heat shield is included. Confirm the spark-arrestor specification and whether the required insert is supplied for your exact system.
Closed-course racing only; not for street or highway use. Match fueling to the finished intake, exhaust and engine; confirm non-U.S. applications.

View the RS-12 Full System

2021–2027 • confirm headerMuffler-system alternative

Yoshimura RS-12 Slip-On

The slip-on route for a closed-course build retaining a compatible original header.

Choose this or the full system. Buying both does not create another exhaust stage.
A carbon heat shield is listed. Match any spark-arrestor insert to RS-12; older RS-4 accessories are not automatically compatible.
Closed-course racing only; not for street or highway use. Confirm the installed header, market and fueling plan.

View the RS-12 Slip-On

2021–2024 onlyEarly electrical application

EJK Fuel Controller — 2021–2024

The early EJK for adjusting fueling on a compatible closed-course CRF300L build.

Does not fit 2025-current models. Use the late application for 2025–2027.
An add-on fuel controller, not a replacement ECU. Configure it for the actual intake, exhaust and engine.
Closed-course racing only; not for street or highway use. Electronic products are nonreturnable; confirm application and destination requirements before ordering.

View the 2021–2024 EJK

2025–2027 • late applicationCorrect late-model choice

EJK Fuel Controller — 2025 Onward

The late EJK for the updated electrical configuration, including the 2027 carryover covered here.

Does not fit 2021–2024. Confirm any non-U.S. harness application before ordering.
If 2027 is absent from the selector, contact us to arrange the correct configuration. Do not select an incorrect bike year.
Closed-course racing only; not for street or highway use. No cancellation, return or exchange after shipment. Have the complete build and tuning plan ready first.

Arrange the Late-Model EJK

2021–2027 • closed courseIntake-conversion components

Complete Airbox Modification Kit

An intake-modification route for a closed-course build that will be tuned and maintained for the change.

Includes a velocity stack, six UNI one-inch breathers and a new OEM airbox cover. Main air filter and complete airbox housing are not included.
The work changes the airbox and is more than a filter swap. Plan professional installation and tuning.
Closed-course racing only; not for street or highway use. Inspect filtration more often in dust. Replace an OEM element when required; it is not a washable foam filter.

Review the Airbox Kit & Requirements

Keep the year match all the way through the order. Early EJK 9110044 is for 2021–2024; late EJK 9110048 is for 2025 onward. A 2027 bike needs the late application. A spark arrestor does not remove an exhaust’s street-use restriction, and more than one fuel controller is not a normal combination.

Clutch Choices

Choose the clutch behavior you need.

Diagnose adjustment, oil, wear and installation first. The three routes below are alternatives with different contents and operating behavior.

2021–2027 • manual clutchManual clutch-pack route

Rekluse TorqDrive Clutch Pack

A manual clutch-pack option after diagnosis establishes that this configuration suits the build.

Reuses OEM clutch springs; replacement springs are not included.
Not an automatic clutch or a replacement pack for RadiusX, RadiusCX or Core Manual TorqDrive systems.
Check adjustment, oil, wear and assembly before treating slipping with new parts. Follow Rekluse’s application and installation instructions.

View the Manual TorqDrive Pack

2021–2027 • complete setup checkAutomatic clutch engagement

Rekluse RadiusX 4.0 Auto Clutch

An auto-clutch route for riders who want supported automatic engagement while retaining gear selection and clutch-lever control.

Includes the specified TorqDrive friction technology, EXP 4.0 components and basket sleeves.
You still select gears. It does not convert the bike to automatic shifting.
Choose this as a system, not an addition to the manual TorqDrive pack or five-spring conversion. Follow Rekluse’s setup, free-play-gain and operating checks.

Review the RadiusX System

2021–2027 • professional installationConventional-clutch conversion

CRF’s Only Five-Spring Clutch Conversion

A more extensive conversion when diagnosis and the intended build call for a conventional five-spring arrangement.

Replaces the original slipper clutch with a conventional basket, hub and pressure plate. Factory assist/slipper behavior is not retained.
Includes the listed Honda hardware, steel plates, bearing, right-case gasket and washers, plus EBC friction plates and springs.
Professional installation and specialty tools are required. Review lever and engagement behavior first; do not combine it with a separate Rekluse system by assumption.

Discuss the Five-Spring Conversion

Choose by behavior, not by the word “performance.” TorqDrive here is a manual pack using OEM springs. RadiusX adds automatic clutch engagement while you continue selecting gears. The five-spring conversion replaces the factory slipper arrangement with a conventional clutch. None of these adds engine horsepower by itself.

Closed-Course Fuel Tanks

Choose capacity with fitment and use in mind.

These tank listings carry closed-course-only terms and exclude street/highway use. Both IMS tanks additionally exclude ABS and Rally. Their capacities are not public-road range recommendations.

Standard CRF300L • confirm configurationLarger closed-course tank

Acerbis 3.6-Gallon Fuel Tank

A larger tank for an appropriate closed-course application, with natural or black color choices.

The listing describes use with the original pump and level switch. Confirm year, ABS equipment and the complete tank/guard combination.
Check the radiator-guard bracket version before fitting a larger tank. Do not assume all existing guards and accessories will clear.
Closed-course racing only; not for street or highway use. Plan capacity and carried fuel weight together; no fixed mileage range is promised.

Review the Acerbis Tank & Fitment

Non-ABS only • not RallySmaller capacity increase

IMS 2.5-Gallon Tank — Natural

A natural-finish tank only for a confirmed non-ABS standard CRF300L application.

Does not fit ABS bikes or CRF300L Rally. The broad year title does not override that exclusion.
Natural and black are alternative finishes. Confirm installation parts and radiator-guard clearance.
Closed-course racing only; not for street or highway use. No express shipping or PO-box delivery.

Confirm Non-ABS IMS Tank Fitment

Non-ABS only • not RallyColor alternative

IMS 2.5-Gallon Tank — Black

The black-finish alternative for the same confirmed non-ABS application.

Does not fit ABS models or Rally. Select one tank; this is a color alternative, not an additional fuel cell.
Check the actual bike, guard bracket and installation parts. Later U.S. bikes with standard ABS need another solution.
Closed-course racing only; not for street or highway use. No express shipping or PO-box delivery.

View the Black Non-ABS IMS Tank

Cylinder Heads & Engine Builds

Plan the complete engine job.

Start with diagnosis, exact country/engine identification and a qualified builder. Cylinder-head preparation, more extensive porting and a big-bore build are different decisions. The big-bore kit carries explicit competition-use restrictions.

USA models only • confirm yearAssembled-head service

OEM Head with OEM Valves & Springs

An assembled new-head route when diagnosis or an engine project calls for a head prepared with OEM valve components.

Includes the listed OEM valves, spring components and seals, CNC valve-seat work, port-to-seat blending and professional valve installation.
Head gasket and header studs are described as optional. More extensive performance porting is separate; confirm how to arrange the required options.
USA models only. This head does not fit non-USA CRF300L models, including Canadian-market bikes. Confirm engine application and installation parts.

Confirm the USA-Spec OEM Head

Confirm country + engine applicationKibblewhite valve option

OEM Head with Kibblewhite Valves & Springs

An assembled-head alternative with Kibblewhite valve components for a confirmed engine application.

Parts list specifies Kibblewhite valves, springs, base washers and retainers, plus OEM seals, cotters and header studs.
Includes valve-seat work, port-to-seat blending and valve installation. Head gasket and more extensive porting are optional.
Confirm country and exact engine compatibility, particularly outside the USA. Do not assume this head family is interchangeable worldwide.

Discuss Kibblewhite Head Fitment

Closed course • professional engine buildDisplacement + compression

301cc Big Bore Kit

An engine-build option for increased displacement and compression with supporting tuning and mechanical work.

Includes a forged 78 mm piston, pre-gapped rings, pin/clips, matched bored OEM cylinder, head/base gaskets and upgraded stud nuts. Listed compression is 11.5:1.
Cams, exhaust and the correct controller are separate. Optional early EJK and JD units on this kit do not fit 2025 onward; arrange late-model tuning separately.
Closed-course competition only; not for street use or public lands, and not legal for sale or use in California under the listing’s terms. Use a qualified builder and the correct installation and break-in instructions.

Plan the Complete 301cc Build

Maintenance Essentials

Buy the contents the service needs.

Check the fluid specification and exact operation. Supplied bottle quantities are not refill capacities, and a service manual’s edition must cover the equipment on the bike.

2021–2027 • verify service specOne-job oil-service kit

Full Synthetic Oil Change Kit

A convenient selection when the supplied oil and filter meet the requirements for your bike and installed clutch.

Current contents: two liters of Motul 7100 10W-40 full synthetic oil, K&N 112 filter, OEM filter-cover gasket and drain-plug crush washer.
Bottle quantity is not an instruction to pour in two liters. Use the correct service refill and level-check procedure.
Choose this or the oil portion of the OEM service kit for the planned job. Recheck level and leaks after service.

View the Synthetic Oil Change Kit

2021–2027 • plan the actual jobOil, air filter + coolant

Complete OEM Service Kit

Build a broader service cart around genuine Honda consumables for oil, air-filter and cooling-system work.

Lists two liters of HP4 10W-40 semi-synthetic oil, OEM oil filter and gasket, drain washer, OEM air filter and a quart of Honda HP coolant.
Confirm prescribed fluids and quantities for each operation. Box contents are not engine or cooling-system refill capacities.
Do not add the separate oil kit or OEM air filter unless you intentionally want different oil or a spare.

View the Complete OEM Service Kit

2021–2027 • original intakeReplacement filter element

Honda OEM Air Filter

A stock-type replacement for maintaining the original filter arrangement.

Match 17220-K1T-E10 to the application and inspect the airbox sealing surfaces during replacement.
Follow OEM element instructions. Do not wash or oil it as though it were reusable foam.
Already included in the complete OEM service kit. Buy separately for filter-only service or an intentional spare.

View the OEM Air Filter

Check edition for year + equipmentWorkshop reference

Cyclepedia CRF300L Service Manual

A service reference for diagnosis, maintenance and workshop planning on the covered application.

Listed contents cover maintenance, engine, clutch, chassis, fuel injection and electrical systems.
Current listing names 2021–2026. Confirm edition coverage for 2027 and later electrical equipment before ordering.
A Cyclepedia publication. Keep the exact Honda owner’s manual and use the correct workshop procedures and specifications for the job.

Check the Service Manual Edition

Closed-Course Tail Option

Check lighting as a complete system.

The featured integrated-tail listing excludes street/highway use. Confirm the year-specific wiring, flasher, mounting and luggage clearance before ordering.

Confirm year + electrical setupClosed-course tail conversion

12oClockLabs / DRC Edge2 Tail-Light Kit

An integrated LED tail-light and compact rear-bracket route for a compatible closed-course configuration.

Includes the processor-board arrangement, plate lighting, hardware and described block-off covers. Separate signals can be retained where supported.
The fixed-rate flasher is optional. Confirm 2025-onward LED wiring and the exact flasher application; an early lighting recipe may not transfer.
Closed-course racing only; not for street or highway use. Electronics are nonreturnable. Check tire, plate and luggage clearance.

Review the Edge2 Kit & Year Fitment

Understand the Tradeoff

CRF300L gearing: shorter or taller?

The final-drive ratio is rear teeth divided by front teeth. A higher number gives shorter gearing: more rear-wheel leverage and more engine rpm at a given road speed in the same gear. It does not create additional engine power.

Front / rear	Ratio	Compared with 14 / 40	Decision to consider
14 / 40	2.857	Reference	Honda’s 2025 U.S. stock reference; check the installed sprockets.
14 / 42	3.000	5.0% shorter	A modest ratio change through the rear sprocket; confirm chain length and adjustment.
13 / 40	3.077	7.7% shorter	More low-speed leverage with a smaller front sprocket; check chain-slider condition and clearance.
14 / 44	3.143	10.0% shorter	A larger change toward low-speed use; plan chain length, guide clearance and higher cruise rpm.

These are calculated ratio comparisons with unchanged tire circumference and transmission gear. They do not predict acceleration times or top speed. Front sprocket choices and the rear sprocket/bolt kit are separate from the chain.

Check the display before buying a calibrator. Measure actual speed-display error after changes and confirm how your year/ABS/market configuration obtains its signal. The featured SpeedoDRD is for 2021–2024 and explicitly excludes 2025 onward. Do not transfer that part to a 2027 bike.

Build the Whole Combination

Exhaust, fueling and engine plans

Decide the bike’s intended use first. The featured exhaust, EJK, airbox and tank products carry closed-course-only terms. For a closed-course build, choose one exhaust route, one correct controller and a tuning plan for every intake or engine change.

Goal	Coherent parts route	Finish the plan
Matched exhaust / filter / controller	The RS-12 performance package contains all three.	Choose the early or late EJK group; verify the final contents if the page shows contradictory year guidance. Plan installation and tuning.
Keep the original header	Evaluate the RS-12 slip-on with the appropriate year-matched fueling plan.	Confirm the header is supported. Do not add a full system to the same cart.
Change intake airflow further	Evaluate the airbox modification kit within the complete build.	Air-filter service becomes especially important. The kit does not include the main filter or complete housing. Retune for the resulting configuration.
Change clutch behavior	Choose a diagnosed manual pack, auto clutch or conventional conversion.	Confirm what behavior is retained or lost. Use one compatible system and the correct setup checks.
Cylinder-head replacement / preparation	Choose OEM valves or discuss the Kibblewhite option for the exact engine.	Confirm country, gasket/stud contents and whether more extensive porting is wanted. A head service does not require buying a big-bore kit.
301cc competition build	Plan the big-bore kit with an experienced engine builder.	Cams, exhaust and controller are separate. The kit’s early controller options exclude 2025 onward; arrange the correct late solution for 2027. Observe the kit’s public-land and California exclusions.

Define the result before buying. Tell us whether the goal is low-speed control, clutch behavior or an engine build for a specific competition use. Include all existing modifications. A power claim from a combined, tuned engine build should not be treated as the gain from a single bolt-on part.

Keep the Travel Build Manageable

Load, range and repair readiness

A small dual-sport benefits from a deliberate packing list. Include the rider’s gear, accessories, rack, tools, luggage and any carried fuel when evaluating the load; then set up and test the finished bike.

Decision	Practical approach
Luggage	Confirm the motorcycle’s loading instructions and each rack/bag limit. Keep heavier items secure and as low and central as the mounting system allows. A rear platform is not automatically a side-bag support.
Rear rack	The featured rack includes hardware, but its Rotopax mount/container are separate. Its one-gallon container guidance is not an unlimited payload rating. Keep straps and bags clear of the exhaust and moving wheel.
Fuel stops	Use measured consumption from comparable loaded riding and leave fuel margin for detours, wind and slower terrain. The reserve quantity is part of the tank total, not extra capacity.
Range example	An illustrative 1.6 US gal planned fuel budget × measured 55 mpg gives an 88-mile leg. These are chosen planning inputs, not Honda’s fuel-economy rating or a guaranteed distance.
Tires and tubes	Match sizes, load/speed ratings, road-use approval where needed and tube requirements to the installed wheels. Carry appropriate tools and spares, and practice repairs before relying on them remotely.
Accessory power	Check charging health, circuit demand and appropriate fuse protection. An AUX connector alone does not convert battery voltage to USB voltage or increase electrical capacity.
Shakedown	Finish maintenance early, secure the full load and ride locally. Recheck sag, steering, braking, heat clearance, rack mounts, fasteners and lighting before a longer trip.

Keep the fuel solution appropriate to the ride. The larger tanks featured here have closed-course-only ordering terms. Do not treat them as routine public-road travel upgrades. Ask us about a suitable fuel and luggage plan for your exact year, country, ABS equipment and intended use.

Build Around Your Riding

Six practical CRF300L starting points

These are sequences of decisions, not preconfigured bundles. Choose the alternatives that solve your problem, confirm fitment and include installation in the plan.

Build 01

Daily miles + weekend backroads

Establish the service baseline, inspect tires and brakes, and set the original controls in riding gear.
If the seat is the limitation, choose the appropriate complete seat style. Add two mirror kits only if replacing both sides.
Choose handguards and one shield style for the riding and bars fitted. Check all controls at full lock.
Assess suspension with the real load. Keep a suitable public-road intake, exhaust and lighting configuration.

Build the Everyday Setup

Build 02

Trail control + practical protection

Begin with tire suitability, correct pressure, suspension condition and rider training.
Choose one K-Tech, mixed or Race Tech suspension package when both ends need work; arrange professional setup.
Choose either the Flatland or AXP skid plate and the standard-model radiator guard.
Add compatible handguards and check boot/control reach. Reassess the bike before planning a gearing change.

Choose the Suspension & Protection

Build 03

Better ground reach

Set sag correctly and identify how much the seat shape and stopping technique contribute to the problem.
Consider the Low complete seat before reducing chassis clearance.
If suspension lowering is still needed, choose a reviewed low-shock package or Kouba-link approach. Do not routinely stack them.
Have the installer check balance, travel, tire clearance and side-stand suitability. Test the finished setup in riding gear.

Compare Ground-Reach Options

Build 04

Light luggage + longer days

Write the packing list, confirm load limits and plan fuel stops using measured consumption.
Choose the rear rack and compatible luggage. Confirm side-bag support if needed, then set suspension for the complete load.
Add the AUX connector only with a properly specified accessory circuit. Carry tire-repair equipment you know how to use.
Use the OEM service kit for the work due when its contents match the specification. Keep the fuel system appropriate to public-road use.

Plan the Travel Setup

Build 05

Matched closed-course performance

Confirm intended-use and destination requirements before selecting competition-only parts.
Choose the RS-12 full-system package with the correct EJK year group. For 2027, arrange the late controller; no second exhaust, filter or EJK is needed.
Add the airbox kit only as part of a coordinated tuning and filter-maintenance plan.
Diagnose the clutch and choose a single clutch route if needed. Complete installation, tuning and setup before evaluating the result.

Plan the Matched Performance Build

Build 06

Engine service or 301cc competition project

Have the engine diagnosed and identify the country-specific engine application before ordering internal parts.
For head work, choose the USA-only OEM-valve head or confirm the Kibblewhite-head application. Review gasket, studs and optional porting.
If the project calls for the 301cc kit, plan all supporting parts and professional work. It is not needed simply to replace a cylinder head.
Use the correct controller for the year, one compatible clutch system and the builder’s installation and break-in instructions. Follow the kit’s closed-course, public-land and California restrictions.

Discuss the Complete Engine Job

Keep the Bike Ready

CRF300L maintenance and ride checks

Use the Honda manual for the exact year and market to set mileage and time intervals. Apply its additional instructions for dust, water and demanding use. The checklist below helps organize the work; it does not replace the service schedule.

When / system	Check	Plan the work
Before each ride	Tires, wheels/spokes, brakes, controls, chain, lights, fluid levels and visible leaks.	Use the specified cold pressures and chain-slack measuring procedure. Check rack, luggage and added accessory mounts.
After dust, mud or wet riding	Air filtration and sealing, radiator surfaces, chain, fork seals and debris behind guards.	Service the actual filter type correctly. Do not wash the OEM element like foam or assume a modified intake has the same dust-service needs.
Oil and filter	Correct oil specification, filter, gasket/washer and the service being performed.	Use the exact drain/refill and level-check procedure. Two supplied liters are not an instruction to use both bottles completely.
Cooling system	Level, leaks, hoses, radiator damage, airflow and fan operation.	Follow the specified coolant and service procedure. A quart supplied in a kit is not a universal full-system refill amount.
Clutch and throttle	Free play, cable condition, smooth movement and positive throttle return.	Use the instructions for the installed clutch and throttle system. Diagnose slipping or dragging before choosing a conversion.
Chain and sprockets	Wear, tight spots, alignment, adjustment and chain-slider condition.	Inspect the complete drive set. Gearing changes may require a different chain length and clearance checks.
Brakes and tires	Pad/disc condition, fluid service due dates, tire wear/damage and wheel condition.	Choose correct sizes and ratings. Recheck safe operation after service; fitment is more than matching a product name.
Suspension and bearings	Leaks, play, binding, linkage condition and changed ride behavior.	Service before tuning. Record springs, sag, available damping settings and the rider/load configuration.
Valves, plugs and engine diagnosis	The exact schedule, service history and starting/running symptoms.	Use the correct workshop specifications. Do not borrow clearance, torque or plug settings from another Honda single.
Battery and wiring	Connections, charging health, fuses, routing and added accessory demand.	Use a charger suitable for the installed battery chemistry. Check steering movement, heat and chafe protection.
Before a longer trip	Work due during the trip, consumable life, tools and repair skills.	Finish service early and test the loaded bike locally. Keep a record of date, odometer, work, parts/fluids and next due service.

New-to-you bike? Start with an inspection and service-history review. Identify existing spring, gearing, intake, electrical and lowering changes before ordering upgrades. Ask a Honda dealer to check the VIN for applicable recalls or service campaigns, and resolve running or chassis faults first.

Find Your Honda Owner’s Manual Check the Cyclepedia Manual Edition Get Service-Part Help

Answers Before You Order

CRF300L rider and upgrade FAQ

The details that change what belongs in the cart, including 2027, suspension, complete kits and model exclusions.

Does this guide cover the 2027 CRF300L?

Yes. Standard CRF300L coverage runs from 2021 through 2027, with the 2027 carryover using the later application where relevant. Individual exclusions still apply: early EJK and SpeedoDRD parts do not become late-model parts, and a non-ABS tank does not fit an ABS bike.

Do these parts automatically fit the CRF300LS or Rally?

No. Identify the exact model. Seat, tank, bodywork and suspension-height differences change the application. The featured complete seat, standard radiator guard and replacement tank-clearance bracket are not Rally selections. Confirm LS suspension components separately.

What information should I send for fitment help?

Year, country, standard/LS/Rally and ABS status, plus existing fork, shock, lowering, tank, guard, handlebar and wiring changes. For suspension, add weight information exactly as requested, riding gear, luggage, terrain and the behavior you want to improve.

What if a product selector does not show 2027?

Contact us with the correct bike details so we can arrange the supported configuration. Do not select an incorrect year to complete the order, especially for a custom suspension package or electronic product.

What is the best first upgrade?

Address the biggest limitation after routine service. For load support and control, start with suspension; for seated discomfort, the seat; for rocks and drops, protection. The first-upgrade table and six build plans give practical starting points.

Does more preload make the spring stiffer?

No. Preload changes sag and the operating position; it does not change spring rate. If support cannot be set correctly within the appropriate adjustment range, discuss the spring and load with a suspension specialist.

How are Race Tech and K-Tech fork springs different?

The Race Tech kit adds a spring in the left damping leg and retains the original right spring. The K-Tech single spring replaces the existing right spring. These are different arrangements; do not combine them without a specialist reviewing total spring rate and damping.

Which K-Tech fork piston kit do I need?

The order selection separates 2021–2022 from 2023-current. Use the later group for the standard 2027 carryover, and identify any previously changed fork internals. This is fork valving, with springs and installation separate unless included in a chosen package.

Do 20IDS cartridges need a separate fork spring kit?

The featured 20IDS listing includes the required springs. Do not add the Race Tech spring kit, K-Tech single spring or separate piston kit to the same conversion. Arrange specialist installation and an appropriate rear-shock setup.

Which complete suspension package should I choose?

All-K-Tech uses K-Tech fork components and an EVO shock. The mixed package uses Race Tech spring/Gold Valve components with an EVO shock. All-Race Tech uses those fork components and a G3-S shock. Choose one route around your goals and installation plan; the contents table helps prevent duplicates.

Is the remote reservoir included with the Race Tech package?

It is optional on the featured order form. Review that configuration before placing the custom order. The order cannot be changed, canceled or returned once the build begins.

Do low suspension packages lower the fork too?

No. Both featured low packages have a low rear shock and standard-height fork components. Have the installer plan chassis balance, clearances and stand lean. No equal front/rear lowering amount is promised.

Can I combine a low shock with a Kouba link?

Do not treat that as a routine combination. It changes geometry and available clearance beyond either part alone and needs a separate professional assessment. Start with correct sag and seat options, then plan one chassis-lowering route.

Is the Seat Concepts product a complete seat?

Yes, it is a complete assembly rather than a foam-and-cover kit. Choose Comfort, Low, Tall or XL as offered. It does not fit Rally, and the made-to-order seat cannot be changed, canceled or returned once ordered. Confirm the cover, shipping option and current build time first.

Should I choose a lower seat or a lower shock?

A lower seat changes where you sit while leaving suspension height unchanged. A lower shock changes rear ride height and needs a chassis/stand plan. Seat shape, knee room, sag and technique all affect the result; compare the reach options before ordering.

Do I need two Doubletake mirror kits?

Yes, if replacing both sides. The featured Adventure Mirror 6.0 kit supplies one side. Confirm mounts and clearance around handguards and any screen.

Are plastic shields included with Zeta handguards?

They are optional. Choose XC or X3 as offered, and treat optional signal accessories as a separate wiring choice. Confirm 2025-onward LED compatibility before adding a flasher or indicator component.

Do I need the Flatland oversized-tank bracket with a new guard?

Current #12-79 guards already include the updated bracket. Older standard-CRF300L guards may need the replacement when adding a larger tank. Inspect the actual version first; the bracket is not for Rally and does not add tank capacity.

Does the rear rack include a Rotopax container and mount?

The featured rack-only product does not include either. It accepts the mount directly and is designed around a one-gallon container, with larger containers not recommended. Confirm all loading and mounting requirements.

Will the IMS 2.5-gallon tank fit my ABS bike?

No. Both featured IMS finishes explicitly exclude ABS and Rally. That excludes the later U.S. standard-ABS CRF300L, including the 2027 carryover. Broad year titles do not override the equipment restriction. The listings also carry closed-course-only use terms.

Which EJK fits a 2027 CRF300L?

The late 9110048 application, subject to the correct market/harness configuration. Early 9110044 is for 2021–2024 and does not fit 2025 onward. If 2027 is missing from the late order selector, contact us for the correct arrangement.

Does the performance package already include the controller?

Yes. The featured package lists a full Yoshimura RS-12 system, K&N air filter and year-matched EJK. Choose the correct year group and resolve any conflicting page guidance with us. Do not add duplicate exhaust, filter or controller parts.

Can I use the featured RS-12 products on a public-road build?

Their current ordering terms specify closed-course racing only and exclude street/highway use. The guide retains those terms. A spark arrestor does not remove the restriction or establish permission for every riding area.

Does the airbox kit include a filter and the whole airbox?

No. It lists a velocity stack, six UNI breathers and a new OEM cover. The main filter and complete housing are separate. It requires an airbox modification, coordinated fueling and appropriate filtration maintenance, with closed-course-only terms.

Is TorqDrive an auto clutch, and does RadiusX shift gears?

The featured TorqDrive is a manual pack using OEM springs. RadiusX provides automatic clutch engagement but you still choose gears. They are separate systems, and the manual pack is not a replacement pack for RadiusX.

What changes with the five-spring conversion?

It replaces the original slipper-clutch arrangement with a conventional five-spring basket/hub/pressure-plate system. Factory assist/slipper behavior is not retained. Diagnose the existing clutch first and discuss the operating tradeoff and professional installation before ordering.

Does the OEM-valve cylinder head fit a Canadian CRF300L?

No. The featured OEM-valve head explicitly fits USA models only and excludes non-USA models, including Canada. The Kibblewhite-head application also needs country/engine confirmation; do not assume global interchangeability.

Does the 301cc kit include everything needed for the power claims?

It includes the listed piston, matched cylinder, rings, gaskets and hardware. Cams, exhaust and the correct controller are separate. Gains described for a combined tuned build are not a promise from the kit alone. Its early optional controllers do not fit 2025 onward; arrange late-model tuning separately.

Will shorter gearing make more horsepower?

No. It changes leverage and rpm at a given speed. Compare the calculated ratios and check chain length and clearance. The early SpeedoDRD is not a 2027 application.

How much oil should I use from the service kit?

Use the refill quantity and level-check procedure for the exact service and bike. The two liters supplied in either kit are packaging quantity, not the instruction to pour in two liters. Confirm the required fluid specification and avoid duplicating the air filter already in the OEM kit.

Your CRF300L. Your Riding.

Build a bike that makes the next ride better.

Tell us your year, country, ABS equipment, riding goals and existing modifications. Add rider and luggage details, and we’ll help you choose compatible parts and a practical order for the work.

Shop CRF300L Parts Get Setup & Fitment Help Call 909-758-8034