This Road Racing Performance thermal group kit is built for the Piaggio Ape 50, but it'll also work on Vespa models with similar engines.

It bumps displacement to 102cc using a Ø55 cylinder and piston setup.

The kit includes 6 specific trays and is designed for performance upgrades.

It's a direct alternative to the Polini 140.0056 kit, but from a different source.
Made outside the EU, so keep that in mind if you're particular about origin.

If you're looking to wake up a small scooter or three-wheeler, this kit gives you more grunt and reliability.

Good for custom builds or restoration projects with a performance twist.