TBparts 149cc Big Bore Kit for 2022+ Honda Grom/ Honda Monkey
About TBparts 149cc Big Bore Kit for 2022+ Honda Grom/ Honda Monkey
TB 149cc Big Bore Kit, 55mm Forged Piston – 2022+ Grom/Monkey125TBparts 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
- These bore kits are only for the 2022 and newer models (will not work on the 2021 and older models as the engine has been redesigned)
- A performance intake and exhaust is recommended if you want to get the most power possible! (Not necessary)
- Tuning Required – The ECU will require a flash/tune to prevent a lean condition and possible damage to your engine.