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All Years of CRF100F/XR100 120cc (58mm) Big Bore Kit:
Affordable and will make your XR100 or CRF100F a lot more fun to ride by adding some needed power. This kit does not require boring of the case - simply bolt on and go!!
There are no installation instructions, but if you can replace your piston, you can install this kit. If you don't have any experience working on your engine, we highly recommend the Clymer's repair manual available in this section. The parts are installed in the same manner as the stock Honda parts.
Replacement Part Info:
TBW0625 - Cylinder
TBW0626 - Piston
TBW0627 - Gasket set