4 Valves Cylinder Head

The Koso 4V Head Kit is the ideal engine part to complete the Koso Honda Grom? Big Bore kit. Because of its unique 4 valve design, the air flow and performance are increased. This new designed head is the perfect addition for those who desire more power and torque.
Features:

• Not legal for use in California on pollution controlled vehicles, race use only in California - waiver available.


• Requires the use of Iridium spark plug


• The 4 Valve Head Kit features a forged piston, stainless steel 24 mm intake valves and 20 mm exhaust valves. Only fits Koso 170cc big bore kit.

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