GY6 Starter Clutch Nut (Notched, Reverse Thread, 39mm)
ITEM# TT-26797
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Description
GY6 Starter Clutch Nut for 125cc, 150cc, and 169cc Engines
The starter clutch nut is a key part in many GY6 engines. It measures 39mm across and has a reverse thread, so it is tightened and loosened in the opposite direction from a standard nut: it turns clockwise to come off. Because of this, it needs careful handling. You will need a starter clutch nut tool to install and remove it properly. Browse our GY6 scooter parts range for other components that affect engine performance.
Design and Functionality
The nut has four notches that give a firm grip, which makes it easier to hold while fitting or removing it. The reverse thread keeps it seated tight during engine operation so it does not work loose on its own. Use the correct tool when servicing it, since the wrong one can damage the nut or nearby engine parts.
When to Replace
Think about replacing the starter clutch nut if you see wear or damage such as stripped threads or cracks. A worn nut may not engage the starter clutch properly, and that can hurt engine performance. Checking it regularly helps you spot problems early and keeps your engine running reliably.
Specifications
- Thread Size: M22x1.00
- Outer Diameter: 30.5mm
- Type: Reverse Thread
- Fits: GY6 150cc (157QMJ) engines, including 125cc, 150cc and 169cc 157QMJ-based engines
Fitment
Fits:
- GY6 150cc (157QMJ)
How to choose: Compare the engine code stamped on your engine against this list: 157QMJ, 161QMK, 152QMI, 1P61QMK, YN1P57QMJ, 1P52FMI, 154FMI, JJ157QMJ, 1P57QMJ, BN157QMJ or BN161QMK-A.
Where it goes: Refer to part #6 on the starter diagram for the GY6 150cc (157QMJ).
Shop more: GY6 Scooter Parts · Chinese Scooter Parts · Scooter Clutches & Clutch Springs · Scooter Starters & Relays · Scooter Parts
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