Polini has become the leader in Italian racing cylinder kits.  Their entry level Contessa options are relatively easy to install, tune, and improve the performance of your scooter.  This 72cc kit for the Yamaha Zuma and BW 50cc Horizontal Engine is the ideal starter big bore kit for someone looking to get significant gain without excess tuning time.

This kit will also fit on many additional minarelli horizontal based engines like:

  • Genuine Buddy, Roughhouse, and Rattler (PGO Models As Well)
  • Yamaha Vino and Jog 2t
  • Aprilia SR (Pre-2000)
  • Adly (Various Models)

Don't forget to properly break in your big bore kit. For break in, we recommend 200-300 mile before running your bike full throttle for any extensive length of time.


*This kit will has a 10mm wrist pin.  Please confirm your model before purchase.*

*All big bore kits are non returnable and have no warranty*

Not legal for use in California on pollution controlled vehicles. Check local laws before installing.

Polini Contessa Big Bore Kit (72cc); Yamaha Zuma 50 2T Horiz

Cylinder Kits

Other products by Polini
  • SKU1100-1459
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Retail Price: $209.00
Your Price: $209.00
In Stock
This product is not intended for use on public roads or land.
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