advance the timing a little.
Your timing is off in most cases, or your carburetor needs adjusting.
check the carberauter
well if its a 2 stroke it needs new reeds if not, your timing is prolly off a bit
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.
I own a 1994 Honda Magna 750 which has the same engine as the vfr 750. I experienced backfiring problems. I went to my local auto supply store and purchased a can of Sea Foam. I mixed the prescribed amount in with my gas. I did this until the entire can was empty. I no longer experience backfiring problems. It was an inexpensive quick fix. Sometimes the carbs get varnish in them and may cause backfiring. Sea Foam cleans the carbs and removes the varnish. Hope this helps you.
You replace them - you do not fix them!
replace spark plugs and wires
Could be a hole or leak at one of the joints or cylinder head bolts / nuts.
You don't have to.
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.
It says on the back of the can not to use it on those tires.
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.