88cc Big Bore Kit with Race Head - Honda Z50, CRF50, XR70 & CRF70
50 Caliber Racing 88cc Race head kit for 88-up Honda 50 or 70cc pit bike. This kit will drastically improve your overall performance on your bike. A stock Honda 50 puts around 2.2hp to the ground and this kit will put you between 5.5-6hp 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!
50 Caliber Racing 88cc Big Bore Kit with Race Head for Honda CRF50, XR50, CRF70 & XR70 Pit Bikes
88cc Race head kit for your Honda 50 or Honda 70. 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!
Specifications:
- Comes with fully assembled race head (with larger valves for significantly increased air flow)
- Performance CDI box included that removes stock rev limiter
- Lightweight aluminum cylinder with steel sleeve
- Cast in mounts on cylinder for aftermarket skid plates
- Oversized cooling fins on cylinder for efficient heat dissipation
- 52mm piston with rings, pin, & clips
- Head gasket kit
- High performance race camshaft
- 20mm Performance carb assembly. Includes: 20mm carb, intake, heatstop, gaskets, mounting
hardware/wrench and air filter
- Extended throttle cable (to fit aftermarket hand throttle)
* High volume oil pump recommended, but not included
Fits the following Honda pit bikes:
- CRF50F (2004-2022)
- CRF70F (2004-2012)
- XR50R (2000-2004)
- XR70R (1997-2004)
- Z50R (1988-1999)
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.
