Why is my bike backfiring?

[JoshuaT]

I have a 93 shadow vt1100 and when you let off the gas at high rpms I'm getting a backfiring. Some people think it sounds good but I don't really like it. I'm not sure if its the Vance and Hines exhaust thats on it or if there's something else. Any help please. Thanks

[BusterBrown]

Your aftermarket exhaust has probably leaned out your mixture if you did not re-jet for it. A leak at the exhaust pipe flange could also cause backfiring.

[bluffmike]

If you changed exhausts without re-jetting the carbs you are running lean. Your air/ fuel mix needs more fuel.

If you have re-jetted the carbs, then you may need to balance them.