88cc Vintage Big Bore Kit with Race Head Honda Z50, CT70, ATC70 68-81

50 Caliber Racing 88cc Vintage Big Bore Kit with Race Head for Honda Z50, CT70, ATC70, SL70 & XL70 Pit Bikes 1968-1981

88cc Race head kit for Your Honda pit bike. This kit will drastically improve your overall performance on your bike. A stock Honda 50 puts around 2.2 hp to the ground and this kit will put you between 5.5-6 hp to the ground and 30% more to the crank! Kit comes with fully assembled race head, performance cam, 20mm carburetor, and all the other goodies needed to fulfill your need for speed!


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)
- Fully assembled race head with 25/22mm valves for increased air flow
- High performance race camshaft and cam sprocket
- 20mm Performance carburetor kit with intake, heatstop, gaskets, and hardware
- Performance foam air filter
- Long throttle cable (twist throttle style)
- Gasket kit

Fits the following Honda Pit Bikes:

- Z50A (1968-1978) K0-78
- CT70 (1969-1982) K0-81
- ATC70 (1973-1985)
- SL70 (1971-1973)
- XL70 (1974-1976)

We have been selling these kits since 2004 and believe they are of the highest quality and put out the most power you are going to find in a Big Bore kit period.