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#P73
Polini High-Speed variator speed control kit for Yamaha Aerox, BWS, Jog R/RR, Neos, Slider/ Minarelli 50cc 2-stroke scooter engines.
This kit includes a Polini variator kit with belt and torque springs for the complete transmission solution.
Included: Polini racing belt, Hi-Speed variator, rollers, and torque springs.
Includes: 5.6g and 6.9g rollers & 22kg and 28kg torque springs.
Polini 241.670.1
Yes, you can continue to use the electric start with this variator kit.
The other Polini variator kit you linked to here is identical to this one but is not such a comprehensive kit.
This kit additionally contains a Polini drive belt plus extra torque spring and additional rollers.

Polini Hi-Speed Variator- Aerox/ Minarelli 50cc
£64.95

Variator Crank Pulley Nut M10x1.25mm- Yamaha Aerox
£0.35