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Trail Bikes 88cc Big Bore Kit + Race Head V2 + Mikuni VM26 Carb Kit - Z50  XR50  CRF50

Roller Rocker Race Head V2 88cc Big Bore Kit
Honda Z50 CRF50 XR50
& Pit bikes w/ Mikuni VM26 Carb
Pricing: $749.95
5 5 1


Roller Rocker Race Head V2 88cc with Mikuni VM26 Carb Kit
Honda Z50 XR50 CRF50 and other pitbikes with Mikuni VM26 Carburetor

     - Roller Rocker Arms
     - 28.5mm intake Valve with 5mm Valve Stem
     - 23.5mm Exhaust Valve with 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.
     - Mikuni VM26 Carb kit

??Recommended improvements:
??     26mm Intake port TBW0433
     Clutch tool TBW1013
     High volume oil pump (Either) -12 V (TBW0226) or 6V for 1981 or earlier models (TBW0225) -
     Oil cooler kit TBW9073

Please Note:
It will save lots of time and effort if the oil pump is installed while installing the bore kit (requires cylinder removal).
Race fuel not need but would work best.. At a minimum we recommend using premium fuel

Parts Included:

-V2 Race head 0750
-V2 Head bolt kit 0755
-Camshaft V2 0752
-V2 Head Cover Set 0754
-Piston -753
-Gasket Set 0859
-Cylinder 0156
-Throttle Cable 0301
-Intake Kit 0433
-VM26 Carburetor 0399
-Air Filter 0413


  • K9115TB
  • K9115TB
  • Trail Bikes
  • New


Shipping Information

  • Item Requires Shipping
  • 8.0 lbs.

Customer Reviews

Comment Total Reviews (1)

  • Currently 5/5 Stars

Reviewed by:

Product ownership: A year or longer

Purchased from: Fast50s

It was a night and day difference after I installed this on my 1994 Z50R kart track race bike. For a 88cc bike this thing screams! Only issue I had is I didn't like the VM26 carb. I ended up buying the 20mm carb kit Fast50's sells, and it fixed any of the issues I was having with bogging. This is a tremendous power upgrades! Revs to the moon and back!

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