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TBPARTS - 114cc Big Bore Kit with Race Head and TB 24mm carb kit for TRX90 Utilizing Stock air box

Vital Information
Part No TBW9238
Stock Level 1 Left

TB 114cc High Compression Bore Kit


  • TRX90 Utilizing Stock Intake manifold and Stock air box

Key Features:

  • Lightweight aluminum cylinder with steel sleeve (huge weight savings over your stock cast iron cylinder)
  • Cast in mounts on cylinder for aftermarket skid plates
  • Oversized cooling fins on cylinder for efficient heat dissipation
  • High compression 54mm piston with rings, pin, & clips (replaces your low compression dished or flat top piston)
  • Head gasket kit
  • High performance race camshaft (for the Race Head only)
  • Race Head with Large valves (25/22mm) and better flow for increased performance.
  • 24mm TB Performance carb 

This will make a huge difference in performance over your stock setup and is a very quick and easy upgrade.

NOTE: TRX90 will not need High volume oil pump AND now this kit is set up for drop on install with no case mods with trx90


  • TBW0788 - Piston
  • TBW0721 - Cylinder
  • TBW0318 - Gasket
  • TBW0385 - Race Head 
  • TBW0300 - Race Cam
  • TBW0230 - Carb
  • TBW0581 - Pilot jet kit
  • TBW0327 - Main jet kit
  • TBW0857 - Throttle cable
  • TBW0133 - Dual Feed Petcock
  • TBW0376 - Intake Gasket
  • TRC-10846 - Heat Spacer

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