my carb jets, ports and passages are clean, fuel pump works fine as well as all hoses are new and unclogged inc the one in the tank. to start my engine i cover the intake to choke(same very reliable starting procedure i have been using for six years with that same engine)after a couple pulls there is gas in the carb, i remove cover and it starts next pull or two.
so i brought my sled home after riding, via a truck and attempted to start it after unloading it, no go so i choked it and when it started it died.
after a couple more attempts it was obvious  it was starving for fuel.

the next day i went through the carb and fuel pump twice, i could keep it running by choking on and off with my hand over the carb(my choke plunger has been froze up since i got the sled thats why i use a different choking method)but no improvement in fuel starvation. ok why this is impossible is because the engine is sound fuel lines and pump are sound carb bowl has gas carb IS clean.

the engine would have been flooding from all the extra gas coming from the choke system been stuck open. you probly just went down 5 jet sizes...lol