Saga 250 Powerquad insane idle

[Codester95]

Hello ChinaRiders, didn't think I would be on here so soon after buying my.....project. Ok so I bought this atv barely running the other day. I let it sit in my shop overnight and trickle charged the battery, put in a new spark plug and cleaned the carb (Deni) the following day. I finally got it started at full choke, then took it off full choke to no choke and it went up to an idle so insanely high and loud that I had to toss on my my earmuffs, and blue flames started coming out my exhaust. It was almost as though I had it on full throttle in neutral, the only way to get it to settle down somewhat was to put on half, 3/4 or full choke, but then it would climb its way up again. The throttle does not seem stuck and if it was it then it shouldn't idle on full choke. Fiddling with the idle screw did not help me much either. Oh PS the carb pisses out fuel through the bottom hose after I shut the bike off. The carb looked pretty clean to begin with. Thanks for any and all help.