GY6 50cc (139QMB) / Rear Drum Brake Arm Kit

Rear Drum Brake Arm Kit for QMB139 and GY6 Scooters

This rear drum brake arm kit suits QMB139 50cc and GY6 125/150cc scooters. It brings back the rear drum brake action so your braking stays dependable on the road. It is one of the GY6 50cc scooter parts we carry, and it includes everything you need for proper brake operation.

What Comes in the Kit

You get three parts: a stamped steel brake arm with a slot for the cable and a hole for the pivot, a textured pin that serves as the brake shoe pivot, and a hex mounting bolt with a flange. All three are matched to work together so the scooter's brake system functions correctly.

Build Quality

The brake arm has a zinc yellow-chromate coating for a tidy appearance. Being stamped from steel, it is sturdy yet fairly light. A cam adjuster nub is included to help you set the brake accurately, which supports safe and consistent stopping.

Specifications

• Material: Zinc yellow-chromate plated steel
• Size: 5.5" L x 4" W x 1" H
• Position: Rear drum brake
• Fits: GY6 50cc (139QMB) and CSC Go, Go Max, Bella Classic 50, Nitro Sport 50 and Pug 50 with rear drum brakes

Compatible Models

Fits:

• GY6 50cc (139QMB)
• CSC Go (rear drum brake)
• CSC Go Max (rear drum brake)
• CSC Bella Classic 50 (rear drum brake)
• CSC Nitro Sport 50 (rear drum brake)
• CSC Pug 50 (rear drum brake)

Choosing the right kit: Pick this kit if your QMB139 50cc or GY6 125/150cc scooter has a rear drum brake. It is not designed for disc brake setups.

Location on diagrams: Refer to part #4 on the rear wheel assy diagram for the GY6 50cc (139QMB) and CSC Go; part #29 on the brakes diagram for the CSC Bella Classic 50; and part #4 on the rear wheel assy diagram for the CSC Go Max.

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