My 06' will only idle/run with the choke on full or 1/2. I have cleaned out the carb jets twice, primary and main, all clear. Also replaced the fuel filter and checked the tank vent. I tried to set the slide screw thinking it was to low, didn't help. With the choke off, it starts backfiring through the exhaust(lean condition) and eventually stalls out. I'm posting on other sites but thought I'd try here first. Thanks for your time.