150cc GY6 Complete Cylinder Head - Non Emission

Full Cylinder Head Assembly for 150cc GY6 Engines

This complete head is built for 150cc GY6 four-stroke engines, including the QMJ157 version. It controls airflow into and out of the engine and helps determine how efficiently fuel burns. When compression drops or the valves start to fail, swapping in a new head can bring back lost power. You can find more options among GY6 scooter parts if you need related components for keeping the engine in good condition.

Role of the Head

Together with the valves and camshaft, the head governs how well the engine takes in and expels gases. Ticking noises or valves that look burnt can point to a head that needs inspection or replacement.

Specifications

• Height: 60mm
• Bore Diameter: 57mm
• Intake Port Diameter: 24mm
• Exhaust Port Diameter: 24mm
• Exhaust Studs: M6x1.00
• Fits: 150cc GY6 4-stroke QMJ157 engines (non-emission, 57mm bore)

Compatibility

Compatible with:

• 150cc GY6 4-stroke QMJ157 engines (non-emission, 57mm bore)
• GY6 QMI/QMJ 152/157 engines

Selection tip: Confirm your engine has a 57mm bore and is a non-emission 150cc GY6 QMJ157 type before ordering.

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