Performance Roller Weights 16x13mm 50cc (139QMB) & GY6 50-80cc

16x13mm Roller Weights for 139QMB and GY6 50-80cc Scooters

These 16x13mm roller weights are made to fine-tune the CVT transmission on your scooter. They come in weights from 5g to 9g, giving you control over the balance between low-end pull and top speed. As part of our GY6 50cc scooter range, they can help bring back performance that has faded as factory weights wear, with gains in both acceleration and fuel economy.

Fine-Grained Adjustment

Pick the weight that suits the performance you want. Lighter rollers tend to get the scooter moving faster off the line, while heavier ones can help it reach a higher top speed. The right set of rollers can noticeably change how your scooter feels on the road.

Build Quality

Each roller combines a low-friction polymer sleeve with a metal core for a durable, dependable part. They are produced in Taiwan to ISO 9001 standards and are designed to handle regular riding as well as performance tuning.

Replacement Guidance

Check your rollers for wear about every 1,000 miles. Flat spots or a drop in top speed are signs they may need replacing. Keeping them in good shape is important for holding onto your scooter's performance.

Specifications

• Material: Low-friction polymer sleeve with metal core
• Size: 16mm diameter × 13mm width
• Available Weights: 5g, 6g, 7g, 8g, 9g
• Origin: Made in Taiwan
• Fits: Buddy 50, RoughHouse 50, Rattler 50, Black Cat 50; Honda Ruckus 50, Metropolitan 50 (pre-2011), Elite 50

Fitment

Fits:

• Buddy 50
• RoughHouse 50
• Rattler 50
• Black Cat 50
• Honda Ruckus 50
• Honda Metropolitan 50 (pre-2011)
• Honda Elite 50
• Honda Dio (AF25, AF27, AF28)
• Yamaha Zuma 50 (2-stroke)
• Yamaha Vino 50
• Yamaha Jog 50
• Chinese/import 139QMB/GY6 50-80cc engines (TaoTao, CSC Go, etc.)
• GY6 80cc (147QMD)

How to choose: Confirm your engine code (139QMA, 139QMB, 1P39QMB, YN139QMB, 147QMD and others listed), then pick a weight from 5g to 9g. Lighter rollers favor quicker acceleration, while heavier rollers favor higher top speed.

Shop more: GY6 50cc Scooter Parts (139QMB) · GY6 Scooter Parts · Scooter Variators & Roller Weights · Scooter Parts