2007 500efi won't idle restarts and revs up but back fires and dies

the valves need adjusted me think

get a colortune tool.it shows how your firing.read instructions that come with,so simple to tune carb in with.sounds like pilot out of adjustment.could also have a leak in ur carb boot or head.take a torch without lighting open valve with motor running run torch around gaskets and front of carb boot listen for change in motor.if it gets higher rev uve found a leak.

An ignition component is gittn hot from wear..buy a shop manual n test um

blocked main jet or low fuel pressure if injectored

Replace the line from tank to carb.

Next time you run it, take the gas cap off when it starts to misfire. If it runs OK with the cap loose, your cap vent isn't working.

Main jet in carburetor partially plugged? Has it been sitting a while, probably varnish from old gas. Clean carburetors.

Try make sure your air cleaner and intake are clear if not it's probably a port in the carburetor that is clogged

If it's been sitting around for a while it could be the idle jet has a little craip in it (it don't take much) but if it's spitting fuel out then I would make sure the float levels aren't sticking.

check your float height? sounds like its high and runs normal when cold like the choke is on but when warm its getting too much fuel.

Hi,

You adjust the idle screw on the carburetor, to do this you will need to run the ATV, rev it and tweak the idle and throttle screws accordingly. Between revs you will need to adjust the idle screw and the throttle screw if needed.