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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:
