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...