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