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TBParts - Roller Rocker Race Head V2 Kit for 146cc
China 120cc & 124cc engines

Vital Information
Part No TBW9125
Stock Level 7 Left

TB Roller Rocker Race Head V2 for 141cc bore kits.
Highest Performance Race head on the market with full parts support in stock.

Meets or Exceeds OEM Specifications.

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
  • 57mm piston with rings, pin, & clips 14mm pin
  • High performance race camshaft (for the Race Head only)
  • Head gasket kit.


  • Sta-bil fuel stabilizer - W-57-1109
  • 26mm Intake - TBW0433

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


  • China 120cc-125cc engines with 141cc Bore kits with 14mm wrist pin

Kit Includes:

  • TBW0751 - V2 Race head
  • TBW0821 - V2 Head bolt kit
  • TBW0752 - Cam
  • TBW0754 - V2 Head cover set
  • TBW0414 - Cam sprocket
  • TBW0824 - Piston
  • TBW0862 - Top end gasket set

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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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