My 07 street bobs cylinders sound different out of the exhaust. The front cylinder sounds deep and the rear sounds like its hissing and popping. Is this normal? It was also idling higher than normal today. It has stage 1 kit with screaming eagle tuner drag pipes and Vance & Hines intake.

 

Try retorquing the bolts holding on the aftermarket exhaust. Make sure the pipes haven't slipped back first.

 

Ok and I will do that first thing tomorrow, if that's doesn't take care of it what should I look to next ?? Cylinder compression?

 

I assume the aftermarket pipes, ecu, intake have been on a while and everything has worked well until now?
You can tell a lot by how the spark plugs are burning, should be light tan on center and side electrodes and ground (not white or black).

 

Ill try an upload if pic of my plugs, they look fairly white to me

 

That was the rear cylinder, here is the front

 

That looks pretty normal. Did you check the exhaust yet?

 

Yeah I checked the exhaust bolts were a little loose but nothing that would make it pull out, I'm gonna go ride it and see how she's doing

 

Just took her for a spin, the front cylinder sounds solid you know "ba bum ba bum ba bum" the rear doesn't, it sounds like its struggling and popping

 

Thanks for all the replies I appreciate it!!