I have a 1993 Dyna 80 cubic inch evo. My bike has started backfiring when riding but if I pull the clutch in slightly it clears up. I have cleaned the carb, cleaned tank out and checked the plugs not sure what to look at next. Any ideas are greatly appreciated.

 

intake or exhaust leak, timing?

 

The usual suspects would be intake and/or exhaust leaks. Might be timing but since it stops when you take the load off the motor, I would look for leaks.