50 Caliber Racing Vintage Stage 1 88cc Big Bore kit fits Honda Z50A Monkey bike parts CT70 SL70 XL70 ATC70 TRX70

Vintage Stage 1 88cc big bore kit has an improved lightweight 52mm piston and cylinder design, with oversized cooling fins for efficient heat dissipation. Includes all gaskets needed for install. Can be installed by anyone with basic mechanical skills who is not afraid to turn some nuts and bolts. Breathe new life into your H brand pit bike with our high quality, affordable, and reliable big bore kit!

Includes:
- 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

Fits the following Pit bikes:
- Z50A (1968-1978) K0, K1, K2 -78
- CT70 (1968-1981) K0-81
- ATC70 (1973-1985)
- TRX70 (1986-1987)
- SL70 (1971-1973)
- XL70 (1974-1976)