I just replaced the detent on my 91 Fatboy (which required R&R of the primary). Every thing went together perfectly and the bike rides like normal. Then, when I put my wife on the back, it sounds like the primary chain is hitting the case (especially when we hit a bump). It's a rattle sound that isn't consistent. It sounds internal and from the front part of the primary. When I ride single, nothing except when I hit a big dip in the road. Any ideas?