I just put in 3:37 gearing in an 04 fatboy and thought I did a good job (manual, etc...) Took it for a ride and I know I want to keep them in there. Got home and next morning went to start it and BANG! Took cover off and no broken teeth so tried to start again, started fine. Over the next few starts (not riding, just starting) it's a crapshoot if it'll BANG or not and now I've got shards of metal broke off from the ring gear. When bike's not running it shifts through gears perfect but when running doesn't want to go from first to second. I've read manual thinking I've missed something but don't think I did. I've adjusted clutch 3 times and it's spot on as is primary chain adjustment. I'm thinking tranny but hope not. I'm running a 95" with ported heads and 37g's, dtt ignition, mik45. Hoping somebody can help me out.