Polini Evolution gear box coverCode: 170.0301The Polini Evolution is a aluminum cover gearbox designed for Piaggio or Yamaha / Minarelli horizontal scooters with 50 cc long casing. Unlike the original crankcases in which the drive shafts slide directly on the cover material, the Polini Gear box eliminates this problem by improving reliability and performance. Equipped with fluorocarbon seal ring (FKM) and O-Ring to improve sliding and any maintenance work. Can be used both with the original gears and with extended ratios allowing the assembly of oversized variators. Black color and the Polini evolution logo milled on the surface complete for an aggressive design./p> Features: - Specific for: Benelli 491ST Morini 2T air cooled
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