108cc V2 Race Head Bore Kit - CRF50 XR50 CRF70 XR70 Z50 - TBW9109

***AUTHORIZED TB PARTS DISTRIBUTOR!!!*** We've stood behind these products 100% since we opened in 2005. Best reviews received for a big bore kit hands down! TB Roller Rocker Race Head V2 (52mm) Big bore kit w/ 51mm Stroker Crank Key Features: Roller Rocker Arms exactly like the V2 head for the KLX110 28.5mm intake Valve 23.5mm Exhaust Valve 5mm Valve Stem 23mm Exhaust port Matching High Compression Piston Head kits include all hardware 52mm piston with rings, pin, & clips. 52mm Aluminum Cylinder High performance race camshaft (for the Race Head only) Head gasket kit. 51mm Stroker Crankshaft with NTN BearingsFitment: 88-99 Z50 00-Present XR/CRF50 91-94 CT70 All XR/CRF70 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 head TBW0821 - V2 Head bolt kit TBW0752 - V2 Cam TBW0754 - V2 Head cover set TBW0753 - Piston 52mm TBW0859 - Gasket Set TBW0156 - Cylinder TBW0287 - Gasket TBW0334 - Gasket TBW0319 - Stroker crank