TheZiggys

You lost me what do you mean "check its not running at 45' ie too lean!!! " ?

I just got a 2000 XT350 it seems to be backfiring through the carb. It starts good but when it gets warmed up it misses and backfires through the carb. I changed the spark plug and looked for air leaks. Changed the secondary carb inlet which the rubber had separated from the mount. The air filter is clean I even left the cover off while l ran it but no difference. I checked the gas flow from the petcock and it's full stream. I'm stumped! Also do these bikes always run so hot?