QMB139 Performance Roller Weight 16x13

Performance Roller Weights upgrade for 50cc 4-stroke QMB139 engines found in scooters by Tank, Roketa, Schwinn, Sunl, Panterra, Kymco and many other unlisted brands.

This should be the first step when upgrading performance on your scooter. Roller weights are the lease expensive upgrade and are very easy to install. The right balance is based on your particular style of riding, since a scooter racer will want heavier weights to achieve a higher overall speed so that they might be faster at full throttle.

Note:

•  Heavier Roller Weight provide a slower take off speed, with more acceleration and higher maximum speed.
• Lighter Roller Weight provide a faster take off speed, with less acceleration and lower achievable speed.