1996 Suzuki Savage 650 backfires on cutoff

could be a bad valve intake side of headdoa compression test to make sure cylinders or reading above 100 lbs per cylinder

Cut off the seat with a toarch

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Sounds like you need to get your carb serviced i.e. cleaned and setup correctly.

Most of the time it is the timing the exhaust valve is opening when the motor is ready to fire or problem 2 could be valves not seating properly

Likely a vacuum leak

The exhaust manafold should NOT glow red, check for intake manafold leak, this can cause a lean running condition and can lead to severe engine damage.

Hi and welcome to FixYa,

Sounds like a very lean mix; confirm by checking the sparkplug tips. If the burn is very light brown to almost whitish, then it would be lean - too much air, too little fuel. Check for an air leak in the air filter box/enclosure. This would also happen if the air filter has been replaced with an aftermarket free breather (like K & Ns) or the exhaust has been replaced and no jettings done.

Postback results of initial checks.

Good luck and thank you for asking FixYa.

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knocking increases with engine speed ...check for worn wrist pin to piston clearance,rod bottom bearing clearance, very unlikely the timing chain has any kinks with a chain tensioner set properly...a loose chain could make some noise so check the tension setting