108cc V2 Race Head Bore Kit - CRF50 XR50 CRF70 XR70 Z50 - TBW9109 BBK - High Volume oil pump

- High Volume oil pump ($25 savings)

clevis pins

Better geometry allows for a bigger cam

- 51mm Stroker Crankshaft

108cc V2 Race Head Bore Kit - CRF50 XR50 CRF70 XR70 Z50 - TBW9109 BBK - High Volume oil pump***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