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TB Parts

117cc V2 Race Head & Mikuni VM26 Bore Kit - CRF50 XR50 CRF70 XR70 Z50 - TBW9112

  • Sale
  • $ 649.95
  • Regular price 649.95


We've stood behind these products 100% since we opened in 2005. Best reviews received for a big bore kit hands down!


TB Roller Rocker Race Head V2 (54mm) Big bore kit w/ 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).

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
54mm piston with rings, pin, & clips.
54mm Aluminum Cylinder
High performance race camshaft (for the Race Head only)
Head gasket kit.
Mikuni VM26 Carb kit
51mm Stroker Crankshaft with NTN Bearings

Replacement Parts:
TBW0750 - V2 Head
TBW0755 - V2 Bolt kit
TBW0752 - V2 Cam
TBW0754 - V2 Head cover set
TBW0753 - Piston
TBW0859 - Head gasket kit
TBW0332 - Cylinder
TBW0287 - Clutch cover gasket
TBW0334 - Center case gasket
TBW0319 - Stroker crank