GY6 Valve Shim

GY6 Valve Shim for 125cc and 150cc Engines

This valve shim suits 125cc and 150cc GY6 4-stroke engines, covering the QMI152/157 and QMJ152/157 models along with the ZNEN engines found on a range of scooter brands. It contributes to engine output by keeping valve action and compression where they should be. It belongs to the GY6 scooter parts range and is often considered when dealing with issues such as low compression or valve noise. Confirm that it matches your engine code and bore size before ordering.

What This Part Does

The valve shim sits within the cylinder head and influences how air and exhaust move through the engine. If you notice ticking sounds or burnt valves, replacing this component can help restore normal running.

Specifications

• Inner Diameter: 16.75mm
• Outer Diameter: 22.50mm
• Thickness: 0.75mm
• Fits: GY6 150cc and 125cc 4-stroke QMI152/157 and QMJ152/157 engines; 150cc GY6 ZNEN engines

Fitment

Compatible with:

• GY6 150cc and 125cc 4-stroke engines (QMI152/157, QMJ152/157)
• GY6 150cc 4-stroke ZNEN engines (Bintelli, Gorilla Motor Works (GMW), Puma scooters)

How to choose: Identify whether your engine code is QMI152/157, QMJ152/157 or ZNEN, then confirm the valve shim measures 16.75mm inner diameter, 22.50mm outer diameter and 0.75mm thickness.

Shop more: GY6 Scooter Parts · Chinese Scooter Parts · Scooter Cylinder Heads & Valves · Scooter Parts