2004 grizzly with only 66 hours on it will not start, have changed plug, getting good spark, had carb off and jets out and completely cleaned them, it will fire for a few seconds after starting fluid has been sprayed in air box but won't stay running, removed fuel line into carb and fuel flows freely from tank, I checked for maybe a vaccum leak but can't find anything cracked or disconnected...can someone tell me my next check...kinda stumped on this one. any help would be appreciated... thanks.

 

probably not your problem, but check to see if any wires that rub the frame have rubbed through the insulation and are touching the frame, grounding it out.

 

sorry about extra reply, clicked the button to many times.