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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OEM Honda CRF70F (XR70) Specs

Displacement 72cc
Bore and Stroke 47mm x 41.4mm
Compression Ratio 9.0:1
Spark Plug NGK CR6HSA
Valve Clearance IN: .002" EX: .002"
Carb/main jet/pilot jet 13mm Keihin / 60 main / 38 pilot
Transmission ratios 3.272 / 1.667 / 1.190
Oil Capacity/Type 0.8 US Quarts / 10W-30
Chain size/front sprocket/rear sprocket #420 chain; 15T/36T
Front tire size 2.50-14
Rear tire size 3.00-12
Seat height 26.1 inches
Wheel Base 42 inches
Weight 139 lbs.

Honda CRF70F (XR70) FAQ