GY6 Cam Chain Assembly

GY6 Cam Chain Assembly for 125cc to 169cc Engines

This GY6 cam chain assembly is built for 157QMJ-based engines, covering 125cc, 150cc, and 169cc versions. It handles engine timing, so it plays a central role in keeping your scooter running correctly. The kit contains all the parts you need to install it: the cam chain, guides, tensioner assembly, bolts, and a gasket. If you are browsing GY6 scooter parts, swapping out a worn cam chain assembly helps keep the engine running smoothly and can extend its service life.

What's in the Box

The assembly includes a 45-link cam chain, two guides, a tensioner assembly, the required bolts, and a cam chain guide bolt. The pieces are made to work together and serve as a direct replacement for the original components, so the engine should run as designed without any modifications.

Signs It Needs Replacing

It's a good idea to check the cam chain assembly regularly, particularly if you hear unfamiliar noises or notice that the engine has lost some power. A stretched or worn chain should be replaced promptly to avoid damage to the engine. Maintaining the cam chain assembly in good condition is key to keeping your scooter performing well.

Specifications

• Cam Chain Links: 45
• Bolt Size: M6-1.00x22
• Includes: Cam chain, guides, tensioner assembly, bolts, gasket, and guide bolt
• Fits: GY6 157QMJ-based 125cc, 150cc and 169cc engines, including 152QMI, 161QMK and 154FMI codes

Fitment

Compatible with:

• GY6 157QMJ-based 125cc, 150cc and 169cc engines (engine codes 157QMJ, 161QMK, 152QMI, 1P61QMK, YN1P57QMJ, 1P52FMI, 154FMI, JJ157QMJ, 1P57QMJ, BN157QMJ, BN161QMK-A)
• Other GY6 engines with QM or FM engine codes (QMJ, QMK, QMI models)

How to choose: Find the engine code stamped on your engine and compare it with the codes listed above. You can also confirm the engine uses a QM or FM code.

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