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TBParts - 114cc Bore Kit w/ Race head (TRX90)

Vital Information
Part No TBW9146-TRX90
Stock Level Out of Stock!
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TB 114cc High Compression Bore Kit


  • TRX90

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
  • Large valves (25/22mm) and better flow for increased performance.
  • 26mm Mikuni carb assembly. Includes: 26mm carb, intake , heatstop, gaskets, mounting hardware/wrench, Improved Dual Layer Air Filter and long adjustable throttle cable (NEW CABLE IS FOR USE WITH THUMB THROTTLE , twist throttle type is availble)

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

Intake provided will set carb directly to the rear and is 80mm tall overall

For Late model TRX90 with Electric start; Carb will need to be positioned in a forward manner

Kit Includes:

  • TBW0788 - Piston
  • TBW0721 - Cylinder
  • TBW0318 - Gasket
  • TBW0399 - Carb 
  • TBW0477 - Air Filter
  • TBW0857 - Throttle Cable
  • TBW0949 - Race Head & Valves Assembly
  • TBW0300 - Race Cam
  • TBW0316 - Intake
  • TBW1020 - 12 Way Rotating Spacer

Note: You May need OEM Honda Dowels for this application
(2) 90701-GF6-000 - DOWEL PIN FOR TRX90
(not included)

(5 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.


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