Big Bore Kit

Koso North America 4-Valve Head with 170cc Big Bore Kit HONDA Grom & Z125 Monkey


Koso North America 4-Valve Head with 170cc Big Bore Kit HONDA Grom & Z125 Monkey

Koso North America 4-Valve Head with 170cc Big Bore Kit HONDA Grom & Z125 Monkey    Koso North America 4-Valve Head with 170cc Big Bore Kit HONDA Grom & Z125 Monkey

170cc BIG BORE & 4V HEAD KIT GROM/MONKEY 13-21. Ideal engine part to complete Koso's big bore kit. Unique four-valve design increases air flow and performance. Provides more power and torque.

Features a forged piston, stainless steel 24 mm intake valves and 20 mm exhaust valves.


Koso North America 4-Valve Head with 170cc Big Bore Kit HONDA Grom & Z125 Monkey    Koso North America 4-Valve Head with 170cc Big Bore Kit HONDA Grom & Z125 Monkey