TB Parts Big Bore Kit, 138cc - HONDA CRF125 TBW9374

TB Big Bore Kit, 138cc – CRF125

Fits  HONDA CRF125

TBW9374

 
TBparts 138cc big bore kit for the Honda CRF125. This will make your trail bike a lot more fun to ride by adding some much needed power. With the larger bore, this bolt-on upgrade kit will give you more power and higher compression for a very reasonable price. This kit does not require boring of the case – simply bolt on, tune (Not included) and go!! This is an ideal option if you’re looking to add some power or you just need a new cylinder, piston, and rings to rebuild your engine.

Key features:

High quality, high compression 55mm piston, with rings, pin, & clips
11.0:1 compression ratio compared to Stock 9.0:1. Our piston is pump 91+ octane gas friendly.
Aluminum cylinder with steel sleeve (55mm)
Head gasket kit with exhaust gasket!
Largest bore you can go without boring the cases
More power and fun at an affordable price
Easy bolt-on kit
+2.6mm of bore or 13cc

Notes:

Fuel Injected models – Tuning Required the ECU will require a flash/tune to prevent a lean condition and possible damage to your engine.

** Kit should be installed by a certified mechanic to ensure proper function.
Improper installation could result in catastrophic engine failure.