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TBParts - Race Head, 88cc Big Bore and 20mm Carb Kit
for Z50 CRF50 XR50 CRF70

Vital Information
Part No TBW0936
Stock Level 3 Left

TBParts race head, 88cc Bore & 20mm Carb Kit. Performance and price make the TBParts 88cc w/ race head a real winner!

Key Features:

  • Lightweight aluminum cylinder with steel sleeve
  • Cast in mounts on cylinder for aftermarket skid plates
  • Oversized cooling fins on cylinder for efficient heat dissipation
  • 52mm piston with rings, pin, & clips
  • Head gasket kit
  • High performance race camshaft
  • Race Head – Larger valves (25mm intake & 22mm exh) and porting for increased performance. Also has bigger cooling fins. Includes all necessary parts.
  • 20mm Performance carb assembly, which includes: 20mm carb, intake, heatstop, gaskets, mounting hardware/wrench, air filter and throttle cable
  • 2 Size clutch tool - WHS-2274
  • 2mm High speed drill bit - TRC-5526
  • TB oil cooler kit w/intake mount - TBW1370
  • TB 12 way rotating spacer 20mm - TBW0900
  • Sta-bil fuel stabilizer - W-57-1109
  • Honda Z50 - 1988-1999
  • Honda XR50 - All Years
  • Honda CRF50 - All Years
  • Honda CRF70 - All years
  • Honda XR70 - All years
  • Honda TRX70 - All years
Kit Includes:
  • TBW0365 - Piston
  • TBW0206 - Gaskets
  • TBW0156 - Cylinder
  • TBW0125 - Carb
  • TBW0273 - Intake Manifold
  • TBW0301 - Throttle Cable
  • TBW0398 - Air Filter
  • TBW0300 - Race Cam
  • TBW0385 - Race Head & Valves Assembly
  • TBW0226 - Oil Pump
  • TBW0262 - CDI
  • TBW0294 - Jets
  • TBW0287 - Gasket
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).
There are no installation instructions, but if you can replace your piston, you can install this kit. If you don't have any experience working on your engine, we highly recommend purchasing the shop manual for your bike available in our store. The parts are installed in the same manner as the OEM parts.

Exceeds OEM Standard equipment

(4 Reviews)

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.