Thursday, January 19, 2012

Why is my bike backfiring?

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. ThanksWhy is my bike backfiring?
When after market pipes are fitted it should be rejetted to suit but needs to by someone who knows how to do it properly its not just a case of buying a couple of jets and putting them in. If you are only using unleaded put premium in and you will notice a big differenceWhy is my bike backfiring?
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.Why is my bike backfiring?
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.
Either exhaust leak or fuel mixture is off causing bike to run lean. Check for leaks in the exhaust and adjust pilot screw if necessary. This will make your fuel mixture richer. If you don't know how to do it yourself take it to someone you trust. Decel popping won't hurt anything by the way.


  1. Just added V&H slash power chamber slip-ons to my Honda Interstate 2015, are there other solutions to "back-firing" other than re-jetting? It only backfires on decel

  2. I just added V&H slip on's on my 15 soft ail slim and getting slight popping between shifting. I'm a little nervous and wondering if I am hurting my bike. Any help would be appreciated. Thank you in advance.