M12x1.25 Flange Nut for GY6 125/150cc Clutch & Flywheel

M12x1.25 Flange Nut for GY6 Engines

This M12x1.25 flange nut is a sturdy spare for GY6 engines. It holds spinning components such as the clutch assembly and flywheel firmly in place. It is one of the GY6 150cc scooter parts mechanics often pick when they want dependable results. The flange on its base adds the extra clamping force needed where vibration is high.

Applications

This nut does two jobs. It fastens the clutch assembly to the transmission's output shaft so power moves through smoothly. It also secures the flywheel to the crankshaft, sitting between the flywheel and the cooling fan, which matters for keeping the engine running properly.

Construction and Use

The nut is made of zinc-plated steel, built to handle demanding conditions. Because installation calls for a lot of torque, it is usually advised to replace it rather than reuse it. A medium-strength thread locker is a good choice to keep it from backing off during use.

Specifications

• Thread Size: M12 x 1.25 (Fine Thread)
• Socket Size: 17mm
• Outer Diameter (Base): 23.5mm
• Total Height: 8.85mm
• Material: Zinc-plated Steel
• Fits: GY6 150cc (157QMJ) engine: clutch bell and flywheel/magneto positions (variator and generator diagrams)

Fitment

Fits:

• GY6 150cc (157QMJ) (variator and generator positions)

How to choose: Look for an M12 x 1.25 fine thread and a 17mm socket, which is the size this nut is made to.

Where it goes: part #8 on the variator diagram for the GY6 150cc (157QMJ); part #5 on the generator diagram for the GY6 150cc (157QMJ).

Shop more: GY6 150cc Scooter Parts (157QMJ) · GY6 Scooter Parts · Scooter Clutches & Clutch Springs · Scooter Stators & Regulators · Scooter Parts