Aprilia SR 50 AC (1997-01) Polini Hi-Speed Variator Kit. Polini Hi-Speed Variator Kit - Minarelli 2T 50cc. Hi-Speed variator with sleeve. 1 x set of variator weights (16x13mm) at 6.9g. This product is suitable for the Aprilia Rally 50 AC 95-04 [ZD4MD0/ ZD4MDD/ ZD4MDH/ ZD4TM].