i have a 2001 arctic 250 4x4 that i bought recently. im rather new to the atv world where this is my first quad ever. so i have been doing work to it ive completely cleaned the carb the jets were clogged really bad. i replaced the starter fuel lines among a few other things. but for some reason the wheeler is idling very high ive tried using the idle adjustment screw but it does nothing. i saw in a forum sometimes it can take a minute to adjust so i was very patiently and no matter which way i turn the screw it does not affect the idling in any way. i have a 5 year son that is dying to be able to ride it but i slams into gear due to the over idling issue so i do not want to damage the tranny or anything else. any help or advice would be greatly appreciated thanks.