Honda CRF70F (XR70)

The Honda 70 was first introduced in 1997 as the XR70. At the time it was a great play bike for big kids, girls, and even adults. The engine was basically the same as the Honda 50 with a bigger bore size, valves, and clutch. The best part was it remained a reliable 3-speed automatic. In 2001, the little 70 received a plastic update to make it look more like the big CRs. In 2004, the 70 got another plastic update and was renamed the CRF70. The strong points of the bike are the Honda reliability and high revving motor. The must have items are the chain guide, bars, exhaust, rev box, and heavy duty springs. The CRF 70 remains a favorite in backyards all over the world.

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Honda CRF70F (XR70) FAQ
Jetting Chart:
OEM Honda CRF70F (XR70) Specs
Bore and Stroke47mm x 41.4mm
Compression Ratio9.0:1
Spark PlugNGK CR6HSA
Valve ClearanceIN: .002" EX: .002"
Carb/main jet/pilot jet13mm Keihin / 60 main / 38 pilot
Transmission ratios3.272 / 1.667 / 1.190
Oil Capacity/Type0.8 US Quarts / 10W-30
Chain size/front sprocket/rear sprocket#420 chain; 15T/36T
Front tire size2.50-14
Rear tire size3.00-12
Seat height26.1 inches
Wheel Base42 inches
Weight139 lbs.
Part diagrams linkHonda CRF70F (XR70) Parts Diagrams (
Service manual linkHonda CRF70F (XR70) Service Manual (
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