we use alot of their stuff, and honestly. The only non-install induced problem we had is loose flywheel rivets on a lightened flywheel. But, we had it lightened, so who is to say that they didn't stop chuck the lathe on it, and cause it to get slightly loose in the first place. Alot of problems people have, is they just bolt on the flywheel and expect everything to work. Pickup gap needs set, you need an rs regulator, you need to seperate the light wiring from the harness, and you need to regulate the lights after the switch if you can (upgraded switch with at least 18 amp contacts in it). This keeps everything from melting together, ruining stuff, and causing runability issues. So, people say they know how to install a stator, but I bet they didn't know all this had to be done to install ia 200w rs unit properly. Then someone will say, well rs says its a stock drop in thing. Well, it is, but you need to re-run some stuff to ensure longevity. Your adding a 100w to the stock regulator, and when the bike is running with lights off, it is shunting 200w to ground at 6k rpm through the regulator.