GY6 58.5mm Cylinder Head
ITEM# TT-16396
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Description
GY6 58.5mm Cylinder Head for 125cc and 150cc Engines
This GY6 58.5mm cylinder head is built for 125cc and 150cc GY6 4-stroke engines, as well as vehicles that run 160-180cc cylinder kits. Its combustion chamber is deeper, which helps the fuel burn more efficiently. If you're planning a repair or upgrade, it's a GY6 scooter part worth considering for better engine output. Keeping this component in good shape is key to dependable running in your scooter.
Construction and Design
The head uses a distinctive layout aimed at better combustion. Exhaust valves measure 23mm across, and intake valves measure 27.75mm. Port diameters are 26.5mm for the exhaust and 27.5mm for the intake, so the head lines up properly and works as intended once it's part of the engine.
Installation Considerations
Be aware that the exhaust threaded holes are shallow, at just 10mm deep. Depending on your setup, you may need to shorten the exhaust studs or use bolts to get a tight seal. Taking care with these points will help the engine run efficiently and reliably after assembly.
Specifications
- Exhaust Valve Diameter: 23mm
- Intake Valve Diameter: 27.75mm
- Exhaust Port Diameter: 26.5mm
- Intake Port Diameter: 27.5mm
- Depth of Exhaust Flange Holes: 10mm
- Fits: GY6 4-stroke engines: 125cc and 150cc, and engine-based vehicles with 160-180cc cylinder kits
Fitment
Fits:
- GY6 QMI/QMJ 152/157 (150cc)
- GY6 125cc and 150cc 4-stroke engines
- Engine-based vehicles with 160-180cc cylinder kits
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