I have a s83 boulevard and was wrecked by previous owner. sideswipped some autos on both sides. found one set of turn signals and need a set for other side of bike. replaced speedometer and headlight and other parts. Problem I have is shen riding it it wants to like backfire and do a lot of cracking and popping. Takes a long time to warm up also. Set out in the weather a long time after being wrecked. any help be appreciated