help!!!! bike will not start has fuel& fire when i try to start it she just backfires like timing is off checked that too all good Help!!!!!

 

Now I see what bike. Back to the same three questions...
Cam timing right?
Ignition timing right?
Valves not too tight, hanging an exhaust or two open?

That is pretty much what happened with my KLX when the cam chain tensioner turned to total crap and the exhaust valves were too tight. I not only had variable cam timing I also had it firing out the exhaust.

You may need a manual cam chain tensioner. I have pictures posted on my web site of a crap tensioner and what to look for. They look fine until you know what to look for.

 

going to ck the timing again was right when i checked will look again

 

Short story of prolbem 2006 ZX10R., went for a short ride in the am ,then bike sat for about 3-4hrs. Thats when it started and shut off i did it again gave some gas and shut off again. Tryed to start it but would not start flooded so pushed back into the "bike house" let it sit over night went out the next day samething. SO went out got new plugs $45,put everything back! nothing crank..crank backfirecrank...crank backfire backfire crank.If I unplug fuel no moer backfire so I have spark and fuel. I also have checked them and I do have both. some say camsensor bad? ecu?cranksensor? Crank??? IT ran fine no loss of power not a sign @ all plugs were bad but have new ones?