variator Polini Hi-Speed for GY6, Kymco 50cc 4-stroke P.11231

Polini Hi-Speed now available in a 4-stroke version set! Hi-Speed stands for better drive and smoother shifting. Supplied as shown with one set of rollers 16x13, 6.9g, and one set of sliders. We recommend a 15% stiffer counterpressure spring with this model. Polini quality for 4-strokes.