BBR introduces the first complete big bore kit for the CRF80 (and XR80)! Our new bore kit includes the cylinder making for a quick and easy upgrade. It features a 52 mm high compression piston resulting in a displacement of 95.6 cc. This kit includes the head gasket, base gasket, and intake gasket. 10.0:1 compression ratio lets it run on pump premium gas. As for all BBR bore kits, we recommend using ethanol free gasoline.
Works with stock camshaft and valve springs or optional BBR performance camshaft (part number 411-HXR-1020 listed in Optional Parts below). OEM Kehin PC18/20 carb works great with minor re-jetting.
- 52 mm piston
- 95.6 cc displacement
- 10.0:1 compression ratio
- Includes new aluminum cylinder, piston, rings, pin, clips, head and base gaskets
- Fits CRF/XR80 model years 1979 - 2013
- Works with BBR CRF/XR100 camshaft (see optional parts below) or OEM camshaft
