Two main kinds: true backfire is when flame leaps out of the intake manifold ... usually when trying to start the car.
The more common form is when a air/fuel mixture builds up in the exhaust system and ignites. Often caused by a single cylinder not firing every time (or not at all).
Common cause for this type of malfunction is improper timing. This is dangerous in these engines. I suggest you take the vehicle to a competent mechanic immediately.
If it is backfiring only when you kill the engine, allow the engine to idle a few minutes before you kill it. If it is backfiring while in use, check the intake gasket and bolts for wear or looseness.
If it is backfiring the timing is set incorrectly or the spark plug wires are not connected in the correct order.
To prevent backfiring make sure the belt is tight and in good working order. Also clean the air filters regularly.
The best answer for this is: Get a tune-up.
backfiring.
Backfiring.
Probably. Backfiring is a symptom of a lean condition. Wouldn't want to leave it like that.
Yes.
Needs a tune up
advance the timing a little.
To stop a Yamaha 1300 from backfiring, first ensure that the air-fuel mixture is balanced, as a lean mixture can cause backfiring. Check and adjust the carburetor or fuel injection settings, if applicable. Additionally, inspect the exhaust system for leaks and ensure that the spark plugs are clean and functioning properly. Regular maintenance and tuning can also help prevent backfiring issues.