Found one on craigslist for $50 and had to try it. Knew it was only going to work on the bottom end but good lord. It used to just be able to get my big butt up but now if i can keep traction it pulls that front end up like a mother. If i'm on anything loose it spins for a bit but it was just enough to get me a little lead on my buddies kq 750 that i now beat him in drags. Installs little tight on the 650i but once i got it in its worth it.