Description
57mm Cylinder Head for GY6 150cc Engines
This 57mm PAIR Cylinder Head is specifically designed for GY6 150cc engines, offering a complete replacement solution for your engine rebuild. It features a fully assembled design that includes the necessary components to replace a damaged cylinder head effectively. With this part, you can restore your engine's performance without starting from scratch. It is one of the straightforward GY6 scooter parts to replace, thanks to its comprehensive assembly and compatibility with the engine layout.
Complete Valve Assembly
The cylinder head comes with a fully integrated valve assembly, which makes the replacement process simpler. With the intake and exhaust valves along with their springs already in place, you can save both time and effort during your engine rebuild. This feature is particularly beneficial for those looking to improve the performance of their GY6 engine.
PAIR-Compatible Emissions System
This cylinder head includes a design that supports the Pulsed Secondary Air Injection (PAIR) system, which helps to reduce harmful emissions by introducing air into the exhaust flow. This function is important for meeting emissions standards while ensuring your engine runs efficiently. For off-road vehicles that do not have this system, the PAIR feature can be sealed off as necessary during installation.
Specifications
- Type: Complete emissions-type cylinder head
- Engine Platform: GY6-A four-stroke
- Primary Application: 150cc QMJ157
- Bore Size: 57 mm
- Overall Height: 60.5 mm
- Head-Stud Spacing: 54 mm
- Diagonal Head-Stud Spacing: 76.5 mm
- Diagonal Valve-Cover Bolt Spacing: 144 mm
- Intake Valve Diameter: 29 mm
- Exhaust Valve Diameter: 23.5 mm
- Emissions Feature: PAIR secondary-air system
- Included: Installed valves and springs; intake and exhaust studs
Fitment
This cylinder head is compatible with GY6-A 150cc QMJ157 / 157QMJ engines. Be sure that the 57 mm bore size and 54 mm stud spacing fit your existing setup before installation.
- GY6-A 150cc QMJ157 / 157QMJ
- GY6 QMI/QMJ 152/157 applications
Not sure it fits? Contact us with your scooter's make, model and year and we'll confirm the fit before you order.
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