i have a 400 ex and i dont want to start i check compresion and she's good spark is good timmming is good and i dont know why is not want to start i also clean the carburetor and i ave gaz on it

 

Please try to clear this up...I know it won't start but what have you tried? is it in nuetral(if not hold in the clutch), in reverse depending on the year, is the battery giving out enough voltage, is there gas and is it getting to the engine for combustion, will it start if you put the choke on, if you could give some more info about the quad that would be great like when it started to do this and if you went through water or something or ran it without oil...just need a little more info so I can figure out what the prob is...Thanks

 

the starter run good its not the problem i dont run in water or snow i ave oil on . is starting to do that when i am going to do a ride last week and is not running after i dont start when i put choke the baterie is in very good shape i dont know if gas go to combustion the atv is an 2001 and the engine was rebuilt a the end of winter last year tank to help me