My bike has backfired pretty loudly twice in the last week right when I started it up. I've not made any changes to the intake or exhaust. It also pops a bit on decel but not nearly as loud as the startup pop. Any help?
The choke is a enrichner, it dumps raw fuel in, and that may be the problem, useing the enrichner to much. Most of the Xs I have seen are a little lean from factory, you may need you A/F screw turned out a bit, to help on the startup.