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trx400EXtreme
09-13-2007, 03:02 PM
wut is the main cause of backfireing?jetted wrong?
bwamos
09-13-2007, 05:41 PM
It's usually the idle circuit running to lean.

Richen up the fuel screw on the bottom of the carb, or if that wont fix it, you may need to go up a size on the pilot jet?

I'm taking it you changed exhaust or air filters? ;)
trx400EXtreme
09-13-2007, 06:22 PM
yes i have. and thanks
dariusld
09-14-2007, 01:36 PM
Exhaust leak can also do it.
trx400EXtreme
09-27-2007, 07:06 PM
Originally posted by dariusld
Exhaust leak can also do it. an exhaust leak where the slip on meets the head pipe? i noticed ive got some black "splattered" all over my shock cover.
dariusld
09-27-2007, 08:18 PM
Originally posted by trx400EXtreme
an exhaust leak where the slip on meets the head pipe? i noticed ive got some black "splattered" all over my shock cover.

Usually at the cylinder head
trx400EXtreme
09-27-2007, 08:49 PM
Originally posted by dariusld
Usually at the cylinder head ok.