i was out today @ 6 am snowmobiling i felt like waking up the neighbours. my stx ws not running well. it would not idle and it would over heat and i had to rev it up to 7000RPM for it to ingage and start to move. it has always had a problem with overheating but it has never had problems idling or engaging. i haven't put new plugs in yet so maybe thats what the idling problem is. have any of you guys have any ideas on how to fix this?