88cc Big Bore Stage 2 kit Compatible with 88-99 Z50 and 2000-2020 xr and crf 50
- 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 (you can still run pump gas)
- Head gasket kit, all gasket included needed for install.
- 20mm Performance carb assembly. Includes: 20mm carb, intake, heatstop, gaskets, mounting hardware/wrench, air filter, and long throttle cable
- Performance camshaft
- High volume oil pump is recommended

This is a great kit to pump up your 50. This kit delivers over 2 times the horse power as the stock motor.

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).