I had similiar problem changed the oil and it fixed it. In thinking because i have a small oil leak in clutch cover from previous owners crash it got a little low but i dont know why this would nake it pop and backfire alot2014 FZ09 w/ 13,500mi
Flash and exhaust have been on the bike for approx 4,000 miles.
One ride I noticed that it was popping a bit on decel. If I ran through a gear hard and cut the throttle it would occasionally backfire.
Seemed to do it mostly in the midrange (5-8k)
Ran like that for around 300 miles and just last night I noticed it wasn't doing it at all. Completely back to normal??
When it was acting up, everything else felt fine. Full power, started right up, idle was good.
I checked for an obvious exhaust leak, but header bolts were fine and muffler was secure.
It started in the middle of a tank of gas, and ended in the middle....with about 3 tanks through it.
I'm not sure what to think of it. Fuel filter perhaps?