TBParts - Vintage Race Head V2 108cc Big Bore Kit and Stroker Crank
Z50 69-81 CT70 3 speed 69-79 ATC70 73-80

Vital Information
On Sale $594.15
Part No TBW9110
Stock Level Check Stock

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.

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.

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.  Crank measures 57mm from gear to end.


  • 26mm Intake Port - Matches Intake Manifold Kit - TBW0433
  • High speed 2mm drill bit - TRC-5526
  • 2 Size clutch tool - WHS-2274
  • TB oil cooler kit w/ intake mount - TBW9073
  • Sta-bil fuel stabilizer - W-57-1109
  • Pre-filter - WHS-1664


  • Z50 - 69-81
  • CT70 3 speet 69-79 
  • ATC70 73-80
Kit Includes:

  • TBW0750 - Race Head
  • TBW0755 - Bolt Kit
  • TBW0752 - Camshaft V2
  • TBW0754 - Head Cover
  • TBW0753 - Piston
  • TBW0859 - Gasket Set
  • TBW0156 - Cylinder
  • TBW0287 - Gasket
  • TBW0334 - Gasket
  • TBW0622 - Crankshaft
  • TBW0422 - Gasket Set
  • TBW0225 - Oil Pump


Since 2004, every purchase from TBolt USA includes access to technical support from our staff of experts and our online Pit Bike Technical Info Database!

We have all necessary support parts on hand.

Most orders ship same, or next business day, unless otherwise noted above.


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