Best trail-first upgradeProtection
BBR Aluminum Skid Plate
6061 aluminum engine-case coverage that also helps keep mud and debris from collecting beneath the engine.
- TIG-welded bolt-on construction
- May not fit some aftermarket cylinders
2004–2012 Honda Mini Trail Bike
Honda CRF70F Rider Guide
Stock specifications, used-bike setup, maintenance guidance and carefully selected CRF70F parts—with clear notes where 1997–2003 XR70R applications overlap.
All Honda CRF Rider GuidesKnow Your Bike
A simple mini trail bike whose condition now matters more than its first upgrade.
The CRF70F combines a 72cc air-cooled four-stroke, 13mm carburetor, kickstarter and three-speed transmission with an automatic clutch. The rider does not use a hand-clutch lever, but still selects all three gears with the left-foot shift lever.
Every CRF70F is now an older used motorcycle. Previous owners may have changed the engine, carburetor, gearing, wheels, suspension, controls or bodywork. Identify the year and installed configuration before choosing parts, and repair starting, steering or braking problems before adding performance.
XR70R and CRF70F are related applications—not one model name
Honda sold the XR70R from 1997–2003 and renamed the updated mini trail bike CRF70F for 2004–2012. Many aftermarket parts span both names because the bikes share substantial hardware. That does not prove every engine, chassis, body or control part fits every year. Use the VIN/model label and each product's exact application—not plastics or graphics alone.
Start Here
Three smart first priorities
Restore a dependable baseline, then build around the rider and the way the motorcycle will actually be used.
-
01
Identify the motorcycle
Confirm the frame label, VIN, model year and installed modifications. Older minis are often rebuilt with parts from several years.
Review Model Guidance -
02
Establish a service baseline
Check cold starting, fuel, carburetor, air cleaner, oil, valves, chain, tires, spokes, bearings, brakes and controls.
Review Maintenance -
03
Match the rider and use
Confirm ground reach, handlebar reach, brake operation and confident low-speed control before choosing youth-trail or adult-mini parts.
Compare Rider-Fit Options
Used-bike rule: If the motorcycle will not start cold, idle cleanly, steer predictably and stop properly, repair those issues before adding a carburetor, ignition or engine-performance part.
Quick Reference
Honda CRF70F stock specs
Use these as stock-reference values for the U.S. CRF70F. Previous-owner modifications are common, so read the installed tire sizes, count both sprockets and follow the year-correct Honda manual whenever a procedure, capacity or torque value matters.
- Front tire
- 2.50-14
- Tube-type; 15 psi cold in the 2006 manual
- Rear tire
- 3.00-12
- Tube-type; 15 psi cold in the 2006 manual
- Front sprocket
- 15 tooth
- Stock reference; count what is installed
- Rear sprocket
- 36 tooth
- Stock reference; count what is installed
- Drive chain
- #420
- Confirm required length before cutting
- Spark plug
- NGK CR6HSA
- DENSO U20FSR-U; gap 0.60–0.70 mm
- Engine
- 72cc
- Air-cooled single-cylinder four-stroke
- Carburetor
- 13mm Keihin
- Carbureted—not fuel injected
- Transmission
- 3-speed
- Automatic clutch; foot shifting required
- Engine oil
- 0.6 US qt
- After draining; 2006 Honda reference specifies 10W-40
- Valve clearance
- 0.002 in
- Intake and exhaust reference
- Starting / brakes
- Kick / drum
- Kickstarter; front and rear drums
2012 Honda reference: Seat height is 25.8 inches, wheelbase is 41.9 inches, curb weight is 141 lb and fuel capacity is 1.3 gallons including a 0.3-gallon reserve. Honda's 2006 manual lists a 132-lb maximum total load, including rider and accessories, for one operator only. Confirm the exact-year label/manual, and measure around the installed 15/36 gearing before sizing a replacement chain.
Find the exact-year Honda owner's manualChoose Your Goal
CRF70F parts and upgrade guide
These are curated starting points, not a list of parts every CRF70F needs. Choose the problem being solved, then confirm the exact model year and installed configuration on the product page.
Protection & Controls
Protect an older mini bike and make every control easy to use
Start with vulnerable areas, worn controls and rider contact points. Every change must preserve full steering, throttle, brake and cable movement.
Wider platformFoot controls
IMS Pro-4 Footpegs
Cast 17-4 stainless-steel pegs with an approximately 2-by-3-inch platform and an outside-edge tooth profile for added boot support.
- Springs are included
- Confirm exact year before ordering
Fine position adjustmentShift lever
Zeta Revolver Shift Lever
A forged-aluminum shift arm that is 10mm longer than stock, with a folding tip offering six rotating positions.
- Useful when boot reach needs refinement
- Check shift range and case clearance
Mini-bike coverageHand protection
Acerbis FirstMoto Handguards
Mini off-road handguards with aluminum bars overmolded in plastic and a model-spanning mounting kit.
- Mounting hardware is included
- Verify bar, lever and cable clearance
Suspension & Rider Fit
Inspect wear first; add spring support only for a real need
Worn bushings, bearings or dampers can feel like weak springs. Inspect the chassis first. These heavier springs are designed around adult mini-bike racing or faster, more aggressive use—not as automatic upgrades for a beginning rider.
Fork clunks or binds?Inspect wear and alignment first.
Fork uses travel too easily?Evaluate front spring support.
Rear bottoms repeatedly?Evaluate rear spring support.
Rider no longer fits?Consider a larger motorcycle.
Adult mini / aggressive useFork
BBR Heavy-Duty Fork Springs
Same-length replacement springs developed for adult backyard racing and faster or more aggressive mini-bike use.
- BBR lists approximately 60% more spring rate for most models
- Preset and stress-relieved spring steel
Adult mini / aggressive useShock
BBR Heavy-Duty Shock Spring
A replacement rear spring developed for mini-bike builds that need more support than the stock spring provides.
- BBR lists approximately 60% more spring rate for most models
- Spring only; retains the stock shock
Rider-fit note: A stiffer spring does not make an undersized motorcycle appropriate for a rider who cannot fit or control it safely. Confirm ground reach, control reach, suspension condition and intended use before changing spring rate.
Engine, Carburetion & Ignition
Restore clean running before building for more performance
On a decades-old carbureted motorcycle, poor starting or response is often a service problem. Check fuel condition, carburetor passages, intake sealing, valve clearance and spark before changing airflow or ignition.
Replacement / modified motorStarting
BBR Forged Kick Starter
A forged 7075-aluminum kick arm paired with a forged-steel knuckle for stock or modified CRF70F engines.
- Useful when the original assembly is worn or damaged
- Confirm spline and year compatibility
Advanced buildIgnition
BBR Rev Box
A direct-replacement CDI with BBR's altered advance curve and rev-limit strategy for a deliberately modified mini-bike build.
- Confirm exact CDI configuration before ordering
- Electronic-item return restrictions apply
Before buying partsFuel system
Identify the installed carburetor
CRF70F carburetor service parts are split by year, and older bikes may no longer have the original carburetor. Record the motorcycle year, carburetor markings and current jet sizes first.
- Do not order by graphics alone
- Do not assume one jet setting fits every build
Fueling note: Intake, exhaust and engine changes can alter jetting needs. Elevation, temperature, fuel and engine condition matter too. Change and verify the complete package rather than copying one universal jet recommendation.
Drivetrain, Tires & Brakes
Start from 15/36 gearing, a #420 chain and the sizes on the sidewalls
Modified mini bikes frequently have non-stock gearing, chain lengths and tire sizes. Count both sprockets, read both sidewalls and inspect wheel clearance before ordering.
Selectable tooth countFront sprocket
JT Front Sprocket
A heat-treated steel front sprocket offered in selectable sizes for replacing worn gearing or making a deliberate gearing change.
- Stock reference is 15 teeth
- Select and verify the intended tooth count
120-link cut-to-fitChain
D.I.D. 420 Standard Chain
A non-O-ring #420 chain supplied with 120 links for sizing to compatible applications.
- 120 links is not presented as the stock length
- Confirm required length before cutting
Stock referenceTires
Verify both wheel positions
The stock reference is 2.50-14 front and 3.00-12 rear. Do not substitute a tire because the rim diameter alone matches.
- Read size and condition on both sidewalls
- Inspect tubes, rim strips, spokes and clearance
Front and rearDrum brakes
Inspect before every return to service
Check lever and pedal operation, cable condition, adjustment, external wear indicators and drum condition before the motorcycle is ridden.
- Use the correct front/rear shoes
- Verify operation after adjustment or service
Service Parts & Information
Give an older CRF70F a known maintenance starting point
Unless reliable records came with the motorcycle, treat its service history as unknown. Begin with the correct manual, fresh fluids, a serviced air cleaner and a complete inspection.
Factory referenceOwner information
Honda Owner's Manual Finder
Honda's official portal includes searchable CRF70F owner information for 2011 and 2012 and provides contact instructions for older manuals.
- Select the exact year and search CRF70F
- Use the manual supplied with the bike first
Track riding timeService planning
Moose Resettable Hour Meter
A no-battery hour meter that wraps around the spark-plug wire and helps track time on a bike without an odometer.
- Peel-and-stick installation
- Not compatible with the hour-meter mounts listed on its PDP
Screw-type adjustersValve service
Motion Pro Tappet Tool Set
A repositionable wrench and driver set designed to hold the locknut while a screw-type tappet adjuster is positioned.
- Includes 8, 9 and 10mm sockets plus three driver styles
- Follow the exact-year service procedure
Browse All CRF70F Parts
The full selection includes universal, replacement and model-specific items. Confirm the exact year and configuration on every product page.
Build Your Setup
Four sensible CRF70F build paths
Use these as priorities, not mandatory packages. Begin with identity and condition, then match the setup to the rider and intended use.
Build 01
Used-Bike Recovery
- Verify VIN, year and modifications
- Inspect fuel, intake and carburetor
- Service oil, valves and spark plug
- Inspect chassis, drivetrain and brakes
Build 02
Youth Trail Baseline
- Confirm rider fit and readiness
- Use complete protective equipment
- Set controls for predictable operation
- Practice with appropriate adult instruction
Build 03
Trail Reliability & Protection
- Add engine-case protection
- Service the air cleaner and fuel system
- Refresh chain and sprockets together
- Inspect tires, spokes and drum brakes
Build 04
Purpose-Built Adult Mini
- Complete chassis and brake service first
- Refine controls and foot position
- Match front and rear spring support
- Coordinate engine, fueling and ignition changes
Older-Bike Baseline
CRF70F maintenance quick guide
This checklist helps establish a starting point when service history is incomplete. Use the Honda owner or service manual for the exact model year to set intervals, fluid levels, procedures and torque values.
| Item | When to check | What to verify |
|---|---|---|
| Identity & modifications | Before the first parts order | VIN/model label, year, engine, carburetor, wheels, gearing and non-stock components |
| Pre-ride inspection | Before every ride | Fuel or oil leaks, tires, spokes, chain, controls, brakes, fasteners and free steering |
| Initial service | About 100 mi / 150 km or 1 month | Complete the exact items in the year-correct Honda schedule |
| Engine oil | Initial service; then about every 600 mi / 6 months | 2006 reference: 0.6 US qt after draining; SAE 10W-40, API SG+, JASO MA |
| Air cleaner | About every 600 mi / 6 months | Service more often in wet or dusty conditions; inspect sealing, airbox and intake boot |
| Fuel & carburetor | After storage or poor running | Fresh fuel, clean tank/petcock/lines, float valve, passages, jets, choke and intake sealing |
| Drive chain & sprockets | Lubricate about every 300 mi / 500 km or sooner if dry | #420 chain, 10–20 mm slack, alignment, 15/36 stock gearing and hooked teeth |
| Spark plug | About every 600 mi / 6 months | CR6HSA or U20FSR-U; 0.60–0.70 mm gap; inspect the cap and replace as needed |
| Valve clearance | Initial service; then about every 600 mi / 6 months | Engine cold: 0.002 in / 0.05 mm intake and exhaust |
| Brakes | Before every ride | Lever/pedal operation, cable condition, adjustment, wear indicators, shoes and drums |
| Chassis | At baseline and periodically | Steering, wheel and swingarm play; fork/shock condition; frame, peg mounts and fasteners |
The numerical baselines above come from Honda's 2006 CRF70F owner information. Follow the full schedule and procedures for the exact motorcycle. Service more frequently after dust, sand, mud, water, long storage or hard use, and record dates or engine hours.
Common Questions
Honda CRF70F FAQ
Quick answers for model identification, stock specifications, maintenance and common setup decisions.
What years does this Honda CRF70F guide cover?
This guide covers the 2004–2012 Honda CRF70F. Some product listings begin in 1997 because they also cover the preceding XR70R. Always confirm the actual model name and the individual product's year range.
Is the XR70R the same as the CRF70F?
The XR70R is the earlier name used for 1997–2003, while the CRF70F name begins in 2004. Many parts overlap, but the shared platform does not make every component interchangeable. Use the frame label and VIN—not plastics, decals or a seller's description—to establish the exact model and year.
Is the CRF70F the same as the CRF110F?
No. Honda replaced the CRF70F in its lineup with the CRF110F for 2013, but the 110F is a different motorcycle. CRF110F application is not proof that a part fits a CRF70F.
Does the CRF70F have an automatic transmission?
No. It has a three-speed transmission with an automatic clutch. The rider does not operate a hand-clutch lever, but still selects first, second and third gear with the left-foot shifter.
Is the CRF70F fuel injected?
No. The stock CRF70F uses a 13mm carburetor. Fuel condition, carburetor cleanliness, jetting, float operation and intake sealing should be checked before poor running is blamed on the ignition or corrected with performance parts.
Does the CRF70F have electric start?
No. The stock CRF70F uses a kickstarter. Inspect a worn or slipping kickstarter assembly before a young rider depends on the motorcycle away from the truck or garage.
What is the CRF70F maximum rider weight?
Honda's 2006 owner information lists a 132-lb (60-kg) maximum total load, including the rider and accessories, with one operator and no passenger. Confirm the label and manual for the exact year. Springs or other aftermarket parts do not increase Honda's published rating.
Is the CRF70F street legal?
No. The U.S. CRF70F was designed as an off-road motorcycle. Registration and equipment rules vary, so adding individual accessories should not be assumed to make it legal for public-road use.
What tire sizes does the CRF70F use?
The stock reference sizes are 2.50-14 front and 3.00-12 rear. Honda's 2006 manual specifies 15 psi cold for both. Read both installed sidewalls and follow the exact-year/manual and tire-maker guidance because wheel or tire changes are common on modified mini bikes.
What chain and sprockets are stock on the CRF70F?
The stock reference is a #420 chain with a 15T front and 36T rear sprocket. Count the installed teeth and determine the required chain length around the actual axle position before ordering or cutting.
What spark plug does the CRF70F use?
Honda specifies an NGK CR6HSA or DENSO U20FSR-U. The 2006 manual gives a 0.60–0.70 mm (0.024–0.028 in) gap. Follow the exact-year manual for inspection and installation.
What oil does the CRF70F use?
Honda's 2006 manual specifies SAE 10W-40 motorcycle oil meeting API SG or higher and JASO MA, with 0.6 US qt after draining and 0.8 US qt after engine disassembly. Use the exact-year oil specification, level-check procedure and fill quantity rather than treating a capacity as a blind pour-in amount.
What should I inspect when buying a used CRF70F?
Verify identity and modifications, then check cold starting, smoke, leaks, fuel condition, carburetor, air cleaner, chain and sprockets, brakes, tires, spokes, wheel and steering play, suspension, frame and footpeg mounts. Confirm every control returns and operates correctly.
What should I upgrade first on a CRF70F?
Begin with a safe, dependable stock baseline. Add a skid plate for trail impacts, refine controls where reach or grip is a problem, and change springs only when condition, rider and pace show a need. Save engine and ignition work for a deliberate, properly fueled build.
Ready to Set Up Your CRF70F?
Confirm the motorcycle, restore a healthy baseline and choose the part that solves the real problem.
Shop CRF70F parts for 2004–2012 or ask CRF's Only to help distinguish CRF70F and XR70R applications before you order.