TBParts - Roller Rocker Race Head V2 88cc Big Bore Kit
XR70 & CRF70

TB Roller Rocker Race Head V2 (52mm) Big bore kit. 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



Recommended:

• 26mm Intake Port - Matches Intake Manifold Kit - TBW0433
• High volume oil pump - TBW0225-6V (before 1982) OR TBW0226-12V (1982-Present)
• Sta-bil fuel stabilizer - W-57-1129
  
• TB 12 way rotating spacer 26mm - TBW1020
• 2 Size clutch tool - WHS-2274
• TBparts oil cooler for V2 heads - TBW9187
• High speed 2mm drill bit - TRC-5526



Application:

• XR70 - All years
• CRF70 - All years



Kit Includes:

• TBW0750 - V2 race head
• TBW0821 - V2 bolt kit
• TBW0752 - V2 race camshaft
• TBW0754 - V2 head cover set
• TBW0753 - Piston
• TBW0859 - V2 head gasket kit
• TBW0156 - Cylinder



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.