16 x 13 Prima Roller Weights

Prima 16x13 roller weights fit most 50cc 139QMB equipped scooters as well as some horizontal 1PE40QMB engines found on some chinese 2 stroke scooters. These rollers are a perfect fit on genuine Rattler 50, Black Cat and Buddy 50. Roller weights are one of the most cost effective ways to get performance from your scooter fine tuning and tweaking.

Tuning Tips:
Light rollers are good for quick acceleration, stop and go riding and hills, but you loose top end speed.

Heavy rollers will give you a higher top end speed (long roads) but you will loose low end acceleration.

If you’re a heavy person (and/or) if you have a stock motor you will want to lean towards the lighter rollers. If you are a light person (under 140lbs) or you have a big bore you will want heavier rollers.