Variator SLIDER Roller Set Racing 16×13 (6g) GY6 50 139QMB 1P39QMB Scooter Mop
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6 PCS a set 6g 16??13 mm Polygon Pulley Rollers fit for scooter, moped with Gy6 50cc 1P39QMB 1P39QMA 4T Engine

It also fit for Honda Dio 50cc 2T Engine.

Technical Details:
1. Normally the one for standard Gy6 50cc 4T is 6g
2. The heavier rollers will got more centrifugal force and can drive the pulley and clutch at lower RPM of engine. So it can be started off the road easier and faster. If you want to saving fuel and increase the top speed , please choose the heavier one.
3. The lighter rollers will got less centrifugal force and it will consumption more fuel when riding but it will got more torque and acceleration make your bike drive like a racing one.
4. When installing, you’d better try to cover the rollers with high-temperature resistant oil and it may help increase the life-span of the rollers and performance.