Got this little atv about 4 years ago it ran great battery died then sat around for the last two years. Couple weeks ago decides to grab a battery and fire it up nope not that easy. Cleaned the carb and it started once, it has spark compression and fuel just doesn't want to fire up. Spits out the fuel from back of carb. Got a brand new carb on it now with new hand breaks to be certain the kill switches are working. Any help would be great debating on tearing it down to take a look at it or not.

 

Are you sure it has compression? Spitting fuel back out sounds like a stuck valve. Check if one has a big clearance.