TB Parts 88cc Big Bore Race Kit - All CRF70 XR70 - 91-94 CT70 - TBW0929

Stock Head 88cc Big Bore Performance Kit (52mm)
All Years CRF70 & XR70
91-94 CT70

- Lightweight aluminum cylinder with steel sleeve
- Cast in mounts on cylinder for aftermarket skid plates
- Oversized cooling fins on cylinder for efficient heat dissipation
- High compression 52mm piston with rings, pin, & clips
- Head gasket kit

We recommend purchasing a high volume oil pump kit.

Installation Note: It will save a lot of time and effort if the oil pump is installed while installing the bore kit (requires cylinder removal).