TB V1 CHINESE CYLINDER HEAD BIG VALVE - TBW0385

This kit is designed and manufactured by TB Parts who specialise in pit bike performance parts in USA. 

This cylinder head is designed with larger intake valve with a roller rocker arm system and high lift cam shaft (not included) for optimum performance.

TB Race Head, Honda V1

TB Parts Original V1 Honda 50/70cc style Racing Cylinder Head.

This cylinder head offers many upgrades over stock that allow your engine to make more HP everywhere and turn even more RPMs.

• Larger intake and exhaust ports

• Larger 25/22mm stainless (21-4n) valves (preinstalled)

• Better valvetrain geometry and HD valve springs (preinstalled)

• Bigger Cooling Fins

• Manufactured to our specs for a value that cannot be beat!

Fits all 69-Current 50cc & 70cc Honda OHC singles, but does require a matching Race Head piston (Will not work with stock pistons or bore)

Fits Honda Engines:

ATC70/ TRX70, ATC70/ TRX70 Engine, CT70, CT70 Engine, SL70/ XL70, SL70/ XL70 Engine, TRX90, XR70/ CRF70, XR70/ CRF70 Engine, Z50 [68/K0-78], Z50 [68/K0-78] Engine, Z50 [79-87], Z50 [79-87] Engine, Z50/ XR50/ CRF50 [1988+], Z50/ XR50/ CRF50/ [1988+] Engine

Fits Chinese Engines:

• YX90

• YX110

Please NOTE:

• Kit comes as shown in photos.

• Can not be used on standard pistons unless valve pockets have been modified to suit larger valves. Failure to do this will result in valve to piston damage.

Item Contains:

• 1x TB PARTS V1 Head 

• 1x Valve Kit - Fitted

• 2x Rocker Arms

• 2x Rocker Pins

• 2x Exhaust Studs

• 2x Tappet Adjusters with Nuts