03 YZ250F ... popping/backfiring... glowing exhaust

My '03 YZ250F has recently started backfiring and popping on deceleration and on idle and also stalls when coming to a stop. Made some adjustments to the fuel screw and it helped a little. Cleaned the carb hoping this would help and when I started it up last night and let it run for about 2 minutes, I noticed that the exhaust pipe at the cylinder was glowing red (maybe to about the bend in the pipe). Was wondering if it seems that I have one issue here or multiple? Thanks. Liz

head pipe will glow in no air flow.

use the sticky pots at th etop of the forum to set up your fuel screw.

make sure the square end of the slide plate it down and that the hot start cable isnt binding.

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