88cc V2 Race Head Big Bore Kit - CRF50 XR50 CRF70 XR70 Z50 - TBW9105

NEW! Roller Rocker V2 Race Head Performance Kit:TB Parts 88cc (52mm) V2 Race Head Big Bore Kit. This kit converts a stock 50 and 70 to 88cc.   Features: - 52mm high compression piston with rings, pin, & clips- Head gasket kit and clutch cover gasket.- High performance race camshaft (for the V2 Race Head only) - Has Roller Rocker Arms exactly like the V2 head for the KLX110- 28.5mm intake Valve- 23.5mm Exhaust Valve- 5mm Valve Stem- 26mm Intake Port (Matches Intake Manifold Kit TBW0433)- 23mm Exhaust port- All pistons in the kits are new and have CNC machined piston domes- Head kits include all hardware- Head kits Include all covers (Billet Dress up kits and Breathers will be available later) - Includes all necessary parts and comes assembled! The exhaust valve has been upgraded to stainless steel (21-4N material)   Installation Note: It will save a lot of time and effort if the oil pump is installed while installing the bore kit (requires cylinder removal).INSTALL TIP - CLICK HERE Replacement Parts: TBW0750 - V2 race headTBW0755 - V2 bolt kitTBW0752 - V2 race camshaftTBW0754 - V2 head cover setTBW0753 - PistonTBW0859 - V2 head gasket kitTBW0156 - Cylinder