Koso Grom 4 Valves Cylinder Head by Koso.*Does not fit 2022+ models Our Koso 4V Head Kit is the ideal engine part to complete the Koso Honda Grom® Big Bore...

Koso Grom AIR Filter (2022+) by Koso.*Fits 2022+ models The new Koso racing air filter intake will increase the airflow, improve filtering efficiency and raise the engine output performance. This...

Koso Grom AIR Filter Cover (2022+) by Koso.*Fits 2022+ models The new Koso racing air filter cover for 2022+ Grom models is not only easy to install, but it will...

Koso Grom Banjo Bolt KIT (2 pcs) by Koso.*Does not fit 2022+ models WARNING THIS IS AN AFTERMARKET PART BUILT FOR RACING PURPOSES ONLY. KOSO IS NOT RESPONSIBLE FOR ANY...

Koso Grom BIG Bore KIT Black (2022+) by Koso.*Fits 2022+ models Made from the best components available on the market, our 150cc Big Bore kit for Honda Grom® and Monkey®...

Koso Grom Chain Tensioner by Koso.This is a KOSO GROM CHAIN TENSIONER

Koso Grom Clutch KIT (Discs + Springs) 2014 + by Koso.*Fits 2014+ models When it comes time to transferring the power of your engine to the ground, the clutch components...

Koso Grom Enhanced Lifter Plate Black by Koso.*Does not fit 2022+ models The main difference between our Koso clutch enhanced lifter plate and the stock one is strength. Our CNC...

Koso Grom Gasket KIT by Koso.*Does not fit 2022+ models Replacement gasket for the 170cc BIG BORE KIT for Honda Grom® and Monkey WARNING THIS IS AN AFTERMARKET PART BUILT...

Koso Grom High Tension Clutch Springs by Koso.*Does not fit 2022+ models Your clutch springs may be the weak spot in the powertrain. These spings are 60% stiffer than the...

Koso Grom Ignition Coil by Koso.This is a KOSO GROM IGNITION COIL

Koso Grom Ignition Coil by Koso.*Fits 2022+ Grom models Koso’s high performance ignition coils are designed using the most advanced materials on the market today. Providing a stronger spark and...