Description
57mm Cylinder Head for GY6 150cc Engines
This cast aluminum cylinder head is designed for GY6 150cc engines, specifically the 157QMJ models. It provides a reliable replacement for damaged or degraded cylinder heads. This component is important for maintaining engine performance. It is one of the straightforward GY6 150cc scooter parts to replace at home.
Construction and Features
This cylinder head features OEM specifications with a bore diameter of 57.4mm. It comes with pre-installed valve seats and guides, making installation easier. The intake and exhaust ports measure 24mm and include M6 threaded connections. This construction ensures compatibility with various GY6-A block engines.
When to Replace Your Cylinder Head
Consider replacing your cylinder head if you notice engine performance issues, such as overheating or loss of power. A damaged or degraded cylinder head can lead to serious engine problems. Replacing it promptly can restore performance and reliability.
Specifications
- Material: Cast Aluminum
- Bore Diameter: 57mm (57.4mm)
- Intake Port Diameter: 24mm
- Exhaust Port Diameter: 24mm
- Port Threads: M6
- Valve Seats: Pre-installed
- Valve Guides: Included
- Country of Origin: China
Fitment
This cylinder head is compatible with various 150cc engines in the GY6 family, particularly those coded as 157QMJ and 152QMI.
- 157QMJ: JJ157QMJ; 1P57QMJ
- BN157QMJ: Other QMJ models
Not sure it fits? Contact us with your scooter's make, model and year and we'll confirm the fit before you order.
Shop more: GY6 150cc Scooter Parts (157QMJ) · GY6 Scooter Parts · Scooter Cylinder Heads & Valves · Scooter Engines & Engine Parts · Scooter Parts
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