TB Parts TB 149cc Big Bore Kit, 55mm Forged Piston- 2022+ GROM/ MONKEY TBW9263

TB Parts 149cc Big Bore Kit, 55mm Forged Piston

Fits 2022+ GROM/ MONKEY

Requires a Fuel Controller & A/F Monitor (SOLD SEPARATELY) for Proper fueling.

TBW9263

TBparts 149cc big bore kit for the 2022+ Honda Grom/Monkey 125. This will make your motorcycle 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, Forged, high compression 55mm piston, with rings, pin, & clips
-11.8:1 compression ratio compared to Stock 10:1. Our 11.8:1 piston is pump 91+ octane gas friendly.
-Aluminum cylinder with steel sleeve (55mm)
-Head gasket kit with exhaust gasket!
-Fits all 2022+ Honda Grom/Monkey 125
-Largest bore you can go without boring the cases
-More power and fun at an affordable price
-Clearance to retain factory piston oil squirter
-Easy bolt-on kit
-+4 HP! More gains if you have a performance Exhaust and Intake

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