Rev the engine six or seven times before coming to a complete stop. Rev it all the way to the edge every time you stop.
well if its a 2 stroke it needs new reeds if not, your timing is prolly off a bit
advance the timing a little.
check the carberauter
The best answer for this is: Get a tune-up.
Your timing is off in most cases, or your carburetor needs adjusting.
The backfiring is due to leaning out the fuel mixture. You can richen up your carbs a bit either by turning the idle mixure screw, or it may require rejetting your carburetors.
If it is backfiring the timing is set incorrectly or the spark plug wires are not connected in the correct order.
Could be a hole or leak at one of the joints or cylinder head bolts / nuts.
motorcycle
More than likely you have a exhaust leak.Check the headpipe seal
Backfiring it normally caused by a car that is very badly out of time. It can also be caused by the spark plug wires being connected incorrectly. Switching to a higher octane will not help at all.
Yes