2014–2027 Standard & Big Wheel Trail Bikes
Stock specifications, Standard-versus-Big-Wheel guidance, generation-specific fitment, rider setup, maintenance priorities and carefully selected CRF125F parts.
All Honda CRF Rider GuidesKnow Your Bike
The CRF125F is Honda's approachable 125cc trail bike with electric start, a backup kickstarter and a four-speed transmission with a conventional hand-operated clutch. It is available as the lower CRF125F Standard and the taller CRF125F Big Wheel, also identified as CRF125FB.
The second decision is model year. The 2014–2018 bikes use a 20mm carburetor; the 2019–2027 bikes use 22mm PGM-FI. CRF's Only has confirmed the applicable 2026–2027 fitment carryover, but every part must still match both the correct generation and the Standard or Big Wheel application where the product distinguishes between them.
Confirm the model year and whether the motorcycle is a Standard CRF125F or Big Wheel CRF125FB before ordering. Wheels, tires, rear sprockets and some chassis or suspension parts vary by version; intake, fueling, exhaust, electrical and body applications can change at the 2019 generation break.
Start Here
Choose the version that fits the rider, verify the exact motorcycle and establish dependable controls and maintenance before adding performance.
Compare both versions in person. The rider needs secure ground reach, comfortable standing room and consistent access to the clutch, front brake, rear brake and shifter.
Review Rider-Fit GuidanceUse the VIN and model label to separate 2014–2018 carbureted from 2019–2027 EFI, then confirm Standard CRF125F or Big Wheel CRF125FB.
Compare Stock SpecificationsCheck oil, air filtration, fuel, battery, spark plug, clutch, chain, tires, spokes, brakes, controls, bearings and fasteners before choosing upgrades.
Review MaintenanceQuick Reference
The tire sizes and gearing below are Honda's stock U.S.-model references. The Standard and Big Wheel share an engine platform but do not share every wheel, drivetrain, chassis or suspension application. Use the exact-year Honda manual whenever a procedure, interval, capacity or torque value matters.
Current version comparison: Honda lists the 2027 Standard with a 29.1-inch seat height, 8.3 inches of ground clearance and 194 lb curb weight. The 2027 Big Wheel has a 30.9-inch seat height, 10.3 inches of ground clearance and a 199-lb curb weight. Both use a 1.0-gallon fuel tank. Suspension travel and hardware vary by version and generation, so confirm the complete application rather than treating the shared engine platform as proof of suspension fitment.
View official 2027 Honda CRF125F specificationsChoose Your Goal
Choose parts for a real need, not simply because they appear in a broad model search. Confirm the model year, carbureted or EFI generation, and Standard or Big Wheel application on every product page before ordering.
Protection, Controls & Chassis
Underside coverage, hand protection, secure foot support and resilient levers can be worthwhile on a trail-ridden CRF125F. Every control change must preserve free steering, clutch function, brake travel and a reliable throttle return.
A 3/16-inch aluminum plate that adds coverage beneath the engine cases for rocks, roots, ruts and trail debris.
A mini-bike-sized aluminum handguard backbone with bar-end adapters and U-clamps for the stock-style 7/8-inch cockpit.
A 57mm chromoly-steel platform for riders who want more boot support and grip than the stock pegs provide.
A forged clutch-and-front-brake lever pair that pivots outward to reduce the chance of breakage in a tip-over.
Suspension & Rider Fit
The Standard and Big Wheel use different fork applications. Diagnose worn parts and measure rider fit before changing spring rate or seat height, and remember that suspension upgrades do not increase Honda's maximum-load rating.
A higher-rate spring pair made specifically for the stock 2019-and-newer CRF125F Standard forks.
A higher-rate spring pair made specifically for the stock 2019-and-newer Big Wheel CRF125FB forks.
A complete bolt-on seat with a one-inch-taller foam profile, non-slip cover and replacement seat base for additional peg-to-seat room.
Leg length, boot reach, standing posture, clutch control and rider skill all matter. Compare both versions with riding boots on whenever possible.
Airflow, Fueling & Exhaust
The shared CRF125F name hides a major fuel-system split. Begin with a clean filter and healthy engine, then keep 2014–2018 carburetor parts and 2019–2027 PGM-FI parts in separate plans.
A washable, separable two-stage foam filter listed across both CRF125F fuel-system generations.
A stainless-head-pipe and aluminum-canister system built for the original carbureted CRF125F generation.
The later-generation T-6 system for the PGM-FI CRF125F platform, with stainless construction, an aluminum canister and carbon-fiber end cap.
Carbureted bikes respond to mechanical cleaning, adjustment and jetting. EFI bikes require fuel-pressure, electrical and injection-system diagnosis before a tuning device is considered.
Drivetrain, Tires & Brakes
Both models use a #428 chain and 13-tooth front sprocket, but their tires and stock rear gearing differ. Read the sidewalls, count both sprockets and inspect the complete braking system before ordering.
A heat-treated steel replacement available in 46-, 49- and 50-tooth choices.
A later-generation guide combining a wear-resistant TPU slider with a CNC-machined duralumin support plate.
A genuine Honda replacement pedal listed for both the Standard CRF125F and Big Wheel CRF125FB.
Standard tires are 70/100-17 and 90/100-14; Big Wheel tires are 70/100-19 and 90/100-16. Honda lists DID 428HD as the replacement-chain type.
Service Parts & Information
The CRF125F is straightforward to maintain, but carbureted and EFI bikes have different fuel and electrical service paths. Confirm the exact year and version before ordering, and do not use a capacity figure as a substitute for checking the oil level.
The Honda-specified standard replacement plug for routine service or replacing a worn or fouled plug.
A printed factory service reference covering the listed 2019–2026 fuel-injected CRF125F and CRF125FB models.
A sealed AGM replacement battery application for the 2019-and-newer fuel-injected CRF125F.
A CNC-machined aluminum plug with a magnetic tip and a pre-wired retaining clip for routine oil-service inspection.
The complete results include universal and version-specific products. Confirm the exact year, Standard or Big Wheel model, installed configuration and product application before ordering.
Build Your Setup
Use these as priorities, not mandatory packages. Start with rider fit and mechanical condition, then keep both generation and wheel-version fitment straight.
Build 01
Build 02
Build 03
Build 04
Dependable Baseline
Verify identity before condition: a modified Standard can look tall, and graphics do not prove the year. Use the VIN and model label, then inspect the motorcycle cold and follow the Honda manual for its exact model year.
| Item | When to check | What to verify |
|---|---|---|
| Year, generation & version | Before the first parts order | VIN/model label, Standard CRF125F or Big Wheel CRF125FB, 2014–18 carb or 2019–27 PGM-FI, and previous modifications |
| Pre-ride inspection | Before every ride | Fuel or oil leaks, tires, spokes, chain, controls, clutch, brakes, fasteners, free steering and throttle return |
| Initial service | About 100 mi / 150 km or 1 month | Complete the exact items in the year-correct Honda maintenance schedule |
| Engine oil | Initial service; then about every 600 mi / 1,000 km or 6 months | SAE 10W-30 motorcycle oil, JASO MA and API SJ or higher; avoid energy/resource-conserving automotive oil; after-drain reference is 1.0 US qt for 2014–18 and 0.9 US qt for 2019–27; verify level by Honda's procedure |
| Air cleaner | About every 600 mi / 1,000 km or 6 months | Clean, correctly oiled foam, sound cage, sealed airbox and intact intake boot; service more often in wet or dusty riding |
| Carburetor fuel system | 2014–2018; after storage or poor running | Fresh fuel, tank, fuel valve, line, choke, float valve, jets, passages and intake sealing |
| PGM-FI fuel system | 2019–2027; after storage or a running fault | Fresh fuel, pump operation, connectors, injector system and fault diagnosis before replacing parts; Honda schedules the fuel filter at 4,800 mi |
| Clutch & shifting | Before every ride; service at the initial and regular intervals | Lever free play, cable routing, smooth friction-zone engagement, four-gear operation and shifter condition |
| Battery & starting | Before riding and after storage | Charge state, terminals, cables, fuse, electric-starter operation and a functioning backup kickstarter |
| Drive chain & sprockets | Inspect/lubricate initially and about every 300 mi / 500 km or 3 months | #428 chain, 25–35 mm slack, lubrication, alignment, adjuster range and worn teeth; stock rear gearing is 46T Standard or 49T Big Wheel |
| Tires & wheels | Before every ride | Correct 17/14 Standard or 19/16 Big Wheel sizes, 15 psi cold Honda baseline, tubes, rim strips, spokes, rims and wheel bearings |
| Spark plug | Inspect about every 600 mi / 1,000 km or 6 months | NGK CPR6EA-9, 0.8–0.9 mm gap, clean cap and correct installation |
| Valve clearance | Initial service; then about every 600 mi / 1,000 km or 6 months | Cold: 0.004 in intake and 0.006 in exhaust; use the exact-year inspection procedure |
| Brakes & controls | Before every ride; service initially and about every 600 mi / 6 months | Front fluid, lever/pedal operation, free play, pad/shoe wear, disc/drum condition, clutch, shifter and throttle |
| Chassis & suspension | At baseline and periodically | Steering, wheel, linkage and swingarm play; fork/shock condition; frame, peg mounts, protection and fasteners |
| Spark arrester | About every 1,000 mi / 1,600 km or 100 operating hours | Clean with the exhaust cool and follow the exact-year Honda procedure |
Intervals above follow Honda's 2027 owner information and are starting points, not substitutes for the complete exact-year schedule. Service more frequently after dust, sand, mud, water, long storage or hard use, and record dates or engine hours.
Common Questions
Quick answers for model years, Standard-versus-Big-Wheel selection, generation fitment, rider setup, specifications, maintenance and upgrade decisions.
This guide covers the 2014–2027 U.S.-market CRF125F Standard and Big Wheel CRF125FB. The major generation split is between the 2014–2018 carbureted bikes and the 2019–2027 fuel-injected bikes.
The Standard uses 17-inch front and 14-inch rear wheels, a 29.1-inch current seat height and 13/46 stock gearing. The Big Wheel, identified as CRF125FB, uses 19-/16-inch wheels, a 30.9-inch current seat and 13/49 gearing. Honda lists two additional inches of current ground clearance for the Big Wheel. Verify the VIN/model label because modified wheels, suspension or graphics can make appearance misleading.
Honda replaced the 20mm carburetor with 22mm PGM-FI for 2019. The later platform also has revised surrounding applications, so intake, fueling, exhaust, electrical, body, seat and some chassis or suspension parts should be purchased by exact year rather than by CRF125F name alone.
Yes. The CRF125F has a four-speed transmission with a conventional hand-operated clutch. It is a logical step for a rider ready to learn clutch friction-zone control, but physical fit, instruction and skill matter more than age alone.
Yes. Both versions and both generations have push-button electric starting plus a backup kickstarter. Keep the battery, charging connections and fuel system healthy rather than using the kickstarter to ignore a starting fault.
Choose by physical fit, skill and total load—not age alone. Honda's current seat heights are 29.1 inches Standard and 30.9 inches Big Wheel. Current maximum total loads are 176 lb Standard and 194 lb Big Wheel, including rider and accessories. A rider who exceeds the applicable rating needs a larger motorcycle; stiffer springs do not increase the limit.
Honda does not publish one fixed top-speed figure in its owner specifications. Actual speed changes with rider, terrain, condition, tire diameter, gearing and modifications. Use fit, skill and control—not an internet top-speed claim—to decide whether the motorcycle suits a rider.
No. The U.S. CRF125F is designed and manufactured for off-road use. Registration and equipment rules vary, so adding a light or another individual accessory should not be assumed to make it legal for public-road use.
The Standard uses 70/100-17 front and 90/100-14 rear. The Big Wheel uses 70/100-19 front and 90/100-16 rear. All are tube type. Honda's owner information lists 15 psi cold front and rear as its baseline; read the installed sidewalls before ordering.
Both versions use a #428 chain and 13-tooth front sprocket. Stock rear gearing is 46 teeth on the Standard and 49 teeth on the Big Wheel. Honda identifies DID 428HD as the replacement-chain type and specifies 25–35 mm slack; count the installed sprockets and determine length around the actual setup.
Honda specifies an NGK CPR6EA-9 with a 0.8–0.9 mm gap. Follow the exact-year manual for inspection, installation and tightening.
Honda specifies SAE 10W-30 motorcycle oil meeting JASO MA and API SJ or higher; avoid energy- or resource-conserving automotive oil. The after-draining reference is 1.0 US qt for 2014–2018 and 0.9 US qt for 2019–2027; both list 1.1 US qt after engine disassembly. Follow the exact-year manual and verify the oil level by Honda's procedure rather than treating capacity as a blind pour-in amount.
Verify the VIN, year and CRF125F or CRF125FB model code; identify the carbureted or EFI generation; request a true cold start; test electric and kick starting, the clutch and all four gears; then inspect fuel and intake systems, oil, smoke, leaks, chain, sprockets, tires, spokes, bearings, brakes, suspension, frame, peg mounts, controls and previous modifications.
Start with correct rider fit, protective equipment, predictable clutch and brake controls, and a complete maintenance baseline. Add practical underside or control protection for trail use, then evaluate suspension support. Save power changes for a healthy motorcycle and a coordinated, generation-correct setup.
Ready to Set Up Your CRF125F?
Shop CRF125F parts for 2014–2027 or ask CRF's Only to help separate Standard and Big Wheel applications or carbureted 2014–2018 and fuel-injected 2019–2027 parts before you order.
