TBParts - Roller Rocker Race Head V2 108cc Big Bore Kit
XR70 & CRF70

TB Roller Rocker Race Head V2 (52mm) Big bore & Stroker Crank kit 108cc Highest performance race head on the market with full parts support in stock.


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 Crank



• 26mm Intake port - TBW0433
• 2 Size clutch tool - WHS-2274
• High volume oil pump - TBW0226-12V OR TBW0225-6V (for 1981 or before)
• TBparts oil cooler for V2 heads - TBW9187
• Sta-bil fuel stabilizer - W-57-1129
  



• XR70 - All years
• CRF70 - All years



• TBW0750 - V2 Race head
• TBW0821 - V2 Head bolt kit
• TBW0752 - Camshaft V2
• TBW0754 - Head cover set
• TBW0753 - Piston 52mm
• TBW0859 - Gasket Set 54mm
• TBW0156 - Cylinder
• TBW0287 - Gasket
• TBW0334 - Gasket
• TBW0319 - Stroker crank



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).

See the Performance Info section for additional information on our performance parts.