I have an 07 Wolverine 450 with 800ish miles . It runs great except when its first started. I have to leave the choke half on for a good 5 minutes after i start it to it bogs down and just stalls out. once it gets warmed up it will start no problem without the choke....maybe its fine? i just feel like it used to idle normal a lot quicker and another atv i had in the past only required the choke to get it started then i could turn it off....does my carb need cleaning? does the choke maybe need to be adjusted? i dont know lol any help is appreciated! One more thing...it has an aftermarket GYTR exhaust from the previous owner and as far as i know thats the only mod. Thanks!