TBParts - Roller Rocker Race Head V2 108cc Big Bore w/ Mikuni VM26
Z50 XR50 & CRF50 1988-Present

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)
• VM26 Mikuni Carb Kit
• Head gasket kit
• 51mm Stroker crank



Recommended:

• High volume oil pump - TBW0226-12V
• 26mm Intake - TBW0433
• 2mm High speed drill bit - TRC-5526
• 2 Size clutch tool - WHS-2274
• TBparts oil cooler for V2 heads - TBW9187
• Sta-bil fuel stabilizer - W-57-1129
  
• TB 12 way rotating spacer - TBW1487



Application:

• CRF50, XR50, Z50 - 1988-Present



Kit Includes:

• TBW0750 - V2 Race head
• TBW0821 - V2 Head bolt kit
• TBW0752 - V2 Cam
• TBW0754 - V2 Head cover set
• TBW0753 - Piston
• TBW0859 - Head gasket kit
• TBW0156 - Cylinder
• TBW0301 - Throttle cable
• TBW0433 - Intake kit
• TBW0399 - Mikuni 26mm carb
• TBW0413 - Air filter
• TBW0287 - Clutch cover gasket
• TBW0334 - Center case 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). We recommend purchasing a high flow oil pump.

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