Description
The 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. The 4...
Koso 4V Head Kit - MC623000 Item # 753551
Description
The 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. 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.
Features:
- Cylinder height: 64.2 mm
- Gasket thickness: Upper: 0.25 mm | Bottom: 0.5 mm
- Piston compression: height: 19.5 mm
- Volume: 169.21cc
- Squish: 1mm
- Cylinder head titration: 13.4 cc
- Compression ratio: 12.3 : 1
- Valve / Tappet clearance: IN: 0.10 mm EX: 0.17 mm
- Camshaft: Torque: 1.71 Hp: 26.26 *measured without air filter & no noise reduction plug
- Requires the use of Iradium spark plug
Part Numbers for Koso 4V Head Kit - MC623000
Fitment for Parts Koso 4V Head Kit - MC623000
This part fits the following vehicles:
