Could be anything from dirty fuel filter, bad fuel pump, fouled spark plugs, worn out plug wires, dirty intake, etc...
A dirty throttle body will cause that.
I, too, would like to know the answer! I have a 1993 Polaris Trail Boss ATV with the 250 cc engine... it tends to backfire when letting off the throttle.
"What causes cars to hesitate?
Unburned fuel in the exhaust system causes the backfire from the exhaust pipe.
I think you are hearing pressure pops. Not a backfire.
a backfire is caused by incorrect timing or not enough back pressure in the exhaust pipe
It's lean.
It's lean.
The load connected to the charger creates a current to flow from the charger to the load.
Backfire is normally caused by engine out of time, or spark plug wires installed incorrectly.
bad gas
Too much PSI.