Koso 4V Cylinder Head Kit - Honda Grom & Monkey
The Koso 4V Cylinder Head kit for the Honda Grom and Honda Monkey is the ideal engine part to complete the Koso Big Bore kit. Because of its unique 4 valve design, the air flow 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!
*Please note: Compatible with 2014-2021 Honda Grom
- Vendor Part Number: MC623000
- 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
