GY6 Kickstart Idle Gear (Reduction Gear) 125/150cc

GY6 Kickstart Idle Gear for 125/150cc Engines

This GY6 Kickstart Idle Gear is made for 125cc and 150cc horizontal 4-stroke engines. Use it to swap out an idle gear that is worn or not working properly, so the kickstart mechanism works as it should. It is one of the GY6 scooter parts that pass kick-start force from the shaft to the crankshaft. Fitting a new idle gear can help your engine's starting system work more dependably.

Construction and Functionality

The idle gear is a two-piece assembly. It has a large outer spur gear with 37 teeth and an inner helical pinion gear. Oval cutouts in the outer gear reduce its weight and help it function. It sits between the kickstart mechanism and the crankshaft, where it carries force through the kick-start process.

When to Replace Your Idle Gear

Consider replacing the kickstart idle gear if the engine is hard to start or the existing part shows wear or damage. Routine checks can catch problems early and help the mechanism stay in good working order.

Specifications

• Number of Teeth: 37
• Shaft Diameter: 12mm
• Overall Length: 98mm
• Engine: GY6 125/150cc horizontal 4-stroke
• Start Type: Kick start only
• Fits: GY6 150cc (157QMJ) horizontal 4-stroke engines with kick start, plus GY6 125/150cc kick start engines

Fitment

Fits:

• GY6 150cc (157QMJ) (kick start only)
• GY6 125/150cc horizontal 4-stroke with kick start (engine codes 152QMI, 154FMI, 1P52FMI, YN1P57QMJ, JJ157QMJ, 1P57QMJ, BN157QMJ, and other QMJ/QMI variants)

How to choose: Confirm your engine is a GY6 125/150cc horizontal 4-stroke with kick start only, and that the part has 37 teeth and a 12mm shaft.

Where it goes: part #6 on the variator diagram for the GY6 150cc (157QMJ).

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