• NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES

The KOSO 4V Cylinder Head Kit for the 2014-2020 Honda Grom and 2019-2021 Honda Monkey is the ideal engine part to complete the Koso 170cc Big Bore kit. Because of its unique 4 valve design, the airflow and performance are increased. This newly designed head is the perfect addition for those who desire more power and torque. The 4 Valve Cylinder Head Kit features a forged piston, stainless steel 24mm intake valves, and 20mm exhaust valves. Feel the speed!

NOTE: This head will only work with 170cc Koso Grom/Monkey Big Bore Kits! This kit will also work with other custom race engine setups that has the valve relief machined onto the piston.

The KOSO 4V Cylinder Head Kit for 2014-2020 Honda Grom and 2019-2021 Honda Monkey with Koso 170cc Big Bore Kit. This is the ideal engine part to ,match with the Koso Honda Grom Big Bore kit for increase horsepower! Because of its unique 4 valve design, the airflow and performance are increased. This newly designed head is the perfect addition for those who desire more power and torque. The 4 Valve Cylinder Head Kit features a forged piston, stainless steel 24mm intake valves, and 20mm exhaust valves. Feel the speed!

• Cylinder Head Height: 14.2mm
• Upper Gasket Thickness: 0.25mm
• Piston Height: 19.5mm
• Cylinder Displacement: 169.21cc
• Squish: 1mm
• Cylinder Head Titration: 13.4cc
• Valve Clearance IN : 10mm, EX : 10mm
• Spark Plug Type NGK-5869ER9EH
• Camshaft Angle: 260
• Torque (max): 1.71
• Horsepower (max): 26.26

NOTES:

Aftermarket fuel controllers and upgraded fuel injectors are required. Professional installation is highly recommended!

Performance upgrades to the clutch are highly recommended!

Disclaimer: NO WARRANTY ON RACE ENGINE parts or engine bore up kits. There is no warranty stated or implied due to the unusual stresses placed on these parts and because we have no control over how they are installed and used. Steady Garage will not be held liable for any failure or damage caused directly or indirectly by the use of these products or engines. The installation and use of these products or engines shall be conclusive evidence that the user assumes full responsibility for any damage caused directly or indirectly by their use.

• NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES