TB parts 120cc big bore and clutch kit for the Honda XR/CRF100. A lot more fun to ride by adding some much needed power. We also include new clutch plates, heavy duty clutch springs, gasket, and cable for the best value possible.

120cc XR100 & CRF100 Big Bore Performance Kit (58mm):

• Aluminum cylinder with steel sleeve
• High compression 58mm piston with rings, pin, & clips
•  Head gasket kit
• Clutch plates, springs, gasket, and cable
• 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 referring to the Clymer’s repair manual. The parts are installed in the exact same manner as the stock Honda parts.