Polini Hi-Speed Variator Kit for 50cc 4-Stroke Air-Cooled SYM, Peugeot ScootersINCLUDES: Hi-Speed variator complete with drive bossReinforced counter pressure spring (20kg back pressure)Evo SliderSet of 16×13 6.3g variator rollersCOMPATIBILITY: Lance – Cabo 50 4T, Cali 50 4T, Havana 50 4T, PCH 50 4T, PCH Delivery 50 4T, Soho 50 4TSYM – Allo 50 4T, Cello 50 4T, Fiddle 50 4T, Mio 50 4T, Orbit 50 4T, Symphony 50 4T, Symply 50 4TPeugeot – Vivacity 50 4T, Speedfight 50 4T, Kisbee 50 4TLatest variator technology from Polini specially designed for the standard un-tuned 50cc engines.This variator has been developed using all components included to increase acceleration and add a little more top speed as the power transmission is much more direct due to the Polini Evo Slider, a friction minimising pad for the counter contra spring.This set can be used with tuned engines. However, the variator roller weights may need to be adjusted to suit.**