My favorite polini kit I still have, it's the first one I bought in like, 2005 or 2007 or something
Soft siezed it like 6 times, it's sat in the rain for a few months, gone through a couple rebuilds and a couple pistons (2? 3? Idk)
It runs great I have it on my most reliable bike, never gets above 395 even on a long East Bay hill