Minarelli V1 Polini, both Italian, and both fast. This kit is high quality. Dial it in, and don't worry about a thing. Not only do you get a really good speed boost, but these kits are very reliable. Sometimes referred to as the 80cc Minarelli Polini Kit.
These work with all Minarelli V1 based Mopeds. Cimatti, Testi, Fantic Motor, Yankee Peddler, Concord, and many more.
Like any performance upgrade, this kit will work better with its paired performance upgrades, like a matching carburetor and expansion chamber pipe. You will also want to modify the transfer ports in the engine cases in order to extract full performance from this item, but it will work at a reduced output as a bolt on addition.
As always on orders over $150, Free shippingin the USA.
Lots of folks are using these kits on Garage. The worlds largest moped tuning database. Here are the list of the top builds in Garage using the Minarelli V1 Polini.