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Polini Oversized 70cc Piston kit - Aerox


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Oversized piston kit for Minarelli/ Aerox Polini sport 70cc cylinders. 47.4mm (+0.4mm)

Polini 204.0624

  • CPI 50cc Oliver, Hussar, Popcorn
  • Malaguti 50cc F10,F12,F15
  • MBK 50 (all)
  • Yamaha Aerox 50
  • Yamaha BWS 50cc
  • Yamaha Jog R/RR
  • Yamaha Neos 50 (2-stroke)
  • Yamaha Slider
  • Q. Do i have to bore the cylinder 0.4mm to fit this piston ?
  • A.

    Correct, an oversize piston allows you to re-use an otherwise damaged cylinder. You would want to check with the shop doing the boring that 0.4mm is enough to clean up any damage to your cylinder and then give the oversize piston to the shop when they do the boring so as they can match the size exactly when they machine the cylinder.