Hey everyone, this is my first time posting, and I'm new to these bikes and their centrifugal clutch system. So we picked up a 4 stroke from someone online who built this bike from scratch, but definitely spend some time on it. Unfortunately that means I can't find much info about it. It ran fine for a while 9 months or so, but then all of a sudden started having some weird problems. So the rear tire spun out of control on start up, it just kept going faster and faster. Pretty wild to see. So I did some research, and learned it was probably the clutch catching the bell. (Forgive me if the terms are wrong) so I pulled it off, greased it up, added a washer Infront of the clutch, behind the bell, and that seemed to help a bit. But now it's having a problem where it feels like it's slipping, almost like it's bogging. I can't wrap my head around what it could be. It was dropped a month ago, the dog jumped up on my girlfriend and she fell over, and I think that's when the problems started. I've included some pictures that might be helpful to someone smarter than me. And insight would be amazing, and I'll try to respond as fast as I can. Thank you so much in advance!