16x13 GY6 50cc (139QMB) Roller Weights

16x13 Roller Weights for GY6 50cc Scooters

These 16x13 roller weights suit a variety of GY6 50cc scooters and aim to sharpen performance and fuel efficiency. Several models can use them, so they're a flexible pick for scooter riders. Like other GY6 50cc scooter parts, they influence how the engine delivers power and how quickly the scooter picks up speed, so they matter for keeping your ride performing well.

How Roller Weights Work

Roller weights sit inside the variator assembly that forms part of the scooter's drive system. As engine speed changes, they shift the gear ratio, which gives a smooth pickup and better torque. Swapping out weights that are worn or damaged can bring back lost performance and help the scooter run efficiently again.

Fitting Notes

Fitting roller weights is a simple job that usually needs only basic hand tools. You'll need to take off the variator cover to reach the weights. Consider replacing them if the scooter feels slow to accelerate or delivers power unevenly, since those are common signs the weights have worn down.

Specifications

• Size: 16x13
• Fits: GY6 50cc (139QMB) engines; Vespa, Piaggio, Honda, Kymco and other listed 50cc scooters
• OEM Part Number: 139QMB

Compatible Models

Fits:

• Vespa ET2 50 (97-05 R)
• Vespa LX 50 (05-15 R)
• Vespa S 50 4T/4V (08-15 R)
• Piaggio Typhoon 50/SE (06 R)
• Piaggio Typhoon 50 2T (10-inch wheels) (07-09 R)
• Baja SC50
• Honda Dio
• Honda Elite 50
• Honda Ruckus 50 (NPS50)
• Kymco Filly 50
• Panterra Fusion 50cc
• Panterra Retro 50cc
• QMB139 50cc/49cc
• Qingqi QM50QT-6V
• SUNL SL50QT-16
• Tank Classic 50QT-6
• Various unlisted makes/models

Choosing a weight: Pick the weight that matches your engine's 139QMB clutch, then choose the gram rating that fits your riding style. Available options are 7.5g, 8.5g, 9.5g and 12.5g.

Browse further: GY6 50cc Scooter Parts (139QMB) · GY6 Scooter Parts · Scooter Variators & Roller Weights · Scooter Parts