Polini offers the popular Hi-Speed variator for 50cc 4-stroke engines: Polini Hi Speed Variator Yamaha Aerox 50cc 4-stroke Euro 4. This is a "standard" model that can be used with...
This is the Polini 16/51 primary transmission for Bws/Zuma 50F & 50X. Installing this Polini primary transmission allows you to lengthen your transmission ratio. This will give you more extension...
Concretely your machine will gain in acceleration and recovery, the top speed will be slightly increased due to the increase in engine torque. The Polini Alu 66cc MBK Booster X...