08 Yamaha road star xv1700
My 08 roadstar has cobra pipes. Before I put my baffles back in it was back firing and popping real bad. I put the baffles back in and it still back fires. I’ve already put new spark plugs in it and it still does it. It was a California bike with all the omissions on it. I’m 3rd owner and the charcoal canister has been removed by previous owner but the AIS lines are still on. Not real savvy on fuel injections. Does anyone have any ideas on how I get rid of the back firing?