I have a 1999 sportsman 500 i pulled it out front in the morning ran great ..that was about 9 am went to pull it back in at 8 pm that night it turns over but will not start checked spark its good its getting fuel i pulled air cleaner cover sprayed starter fluid it dont even try to start PLEASE HELP IM STUMPED

 

Pull the black wire from the reverse limiter and see if it will run. They can retard spark even in neutral or in forward range and not be able to crank when they short out as many have done even if they show to have spark. If that doesn't help pull the black wire from the cdi to isolate the cdi kill system from the ignition switch and left control switch.Plus if you haven't checked valve clearance it's .006 intake and exhaust.