Upgrade your Honda MSX125 Grom with the KOSO Grom 170cc Big Bore Kit, designed for models from 2013 through 2020. This comprehensive kit features a forged big bore cylinder with ceramic coating, ensuring durability and efficient heat dissipation for enhanced performance. The kit includes a 4-valve piston and all necessary gaskets, providing a reliable boost to your engine's power output. The complete 4-valve cylinder head comes with a camshaft, rocker arms, intake manifold, and all associated components, facilitating a straightforward installation and optimal engine airflow.
Perfect for enthusiasts seeking increased horsepower and torque, this kit is ideal for racing or recreational riding. It is important to note that this product is not legal for use in California on pollution-controlled vehicles, and is intended for race use only within California—waiver available.
The fitment covers a wide range of Honda MSX125 Grom models, including the 2013, 2014, 2015, 2016, 2017, 2018, 2019, and 2020 versions, including ABS variants. Enhance your Grom's performance with this high-quality, reliable upgrade from KOSO, crafted to meet the needs of serious riders and performance enthusiasts alike.

Features:

• Koso ceramic coated big bore cylinder kit forged with 4-valve piston and gaskets

• Koso 4-valve cylinder head complete with camshaft, rocker arms, intake manifold, and all associated components

• Designed for easy installation and reliable performance enhancement

• Not legal for use in California on pollution-controlled vehicles; race use only in California with waiver

Fitment:
2013 Honda MSX125 Grom
2014 Honda MSX125 Grom
2015 Honda MSX125 Grom
2016 Honda MSX125 Grom
2017 Honda MSX125 Grom
2018 Honda MSX125 Grom
2018 Honda MSX125A Grom ABS
2019 Honda MSX125 Grom
2019 Honda MSX125A Grom ABS
2019 Honda Z125 Monkey
2019 Honda Z125A Monkey ABS
2020 Honda MSX125 Grom
2020 Honda MSX125A Grom ABS
2020 Honda Z125 Monkey
2020 Honda Z125A Monkey ABS