i just bought this atv a couple days ago, it runs great the only problem is that if i let it sit and idle for a couple minutes it shuts off. i have tried letting it sit and idle warm and cold it still shuts off. i checked the spark plug and it looks dirty i think ill start there. any other suggestions?
THANKS IN ADVANCE!!!!

 

Yes if the plug doesn't look good replace it .. Then I would check the pilot screw , the base setting is 2 1/4 turns ... The idle is 1400 plus/minus 100 ...