I just bought a 96 Savage 650. It has a Jardine pipe and it backfires loud when I shut it off. Also it pops when changing gears and it shoots a flame out of the pipe about a foot long and the pipe is discolored where it has been really hot.  I was told it was running rich so I took out the air filter to see if more air would help and it now seems worse.  I need some advice.  Thanks

Have ya looked at the plug?
If its running rich, now, what would happen if it was even richer? TRy it, pull the choke out 1/2 way, then al;l the way, & see, cuz it doesnt restrict airflow, it just adds gas, so you can use that, kinda sortaish, while deciding what the carb needs. You could drop the bowl & see what jet you are running.