I obviously didn't line it up correctly when putting on the cylinder after doing a top end. Could have sworn it was lined up but guess not, it's hard to see in there and then I just tightened it down in hopes that it was. I followed the manual as far a postioning of the two pieces, but I don't know what happened. I realized my powerband wasn't working on a test ride, so I tore it down again and tried to line it up and that's when I saw the tooth was bent!!! so now I think I'm Sh*t out of luck!! I ordered a new drive shaft but I hope I can line it up right. Any tips on getting that thing in there??