Koso 150cc Big Bore Kit - Honda Grom & Monkey (2022+)

SKU: 128-53

This item is IN STOCK

Current Stock: 2

Made from the best components available on the market, Koso's 150cc Big Bore kit is the perfect addition to upgrade your performance! The kit includes a black powder coated cylinder, 54 mm forged piston, rings, pin and gasket kit. Its compression ratio of 11.38 to 1 will allow you to still use premium pump gas and keep the reliability of a stock motor.

***Please Note: You may need to modify your engine case to accommodate the larger cylinder***

*Please note: Compatible with 2022 and newer Honda Grom and Monkey

  • Cylinder Displacement: 150cc
  • Cylinder Material: Aluminum/Black Powder Coated
  • Piston Diameter: 54mm
  • Piston Type: Forged
  • Compression Ratio: 11.38 to 1
Honda Grom 125, Honda Monkey 125