All good things to be checked,as has been mentioned. You can get an extra spark plug, new if you have one. Any plug, car, lawn mower, doesn't matter Pull the plug wire cap off of the plug that is in the engine and place it on your "test" plug. Make sure it's pushed down good and then lay the test plug on the engine where you can see it. ( it must be touching metal) Set the bike on the center stand and retract the side stand.Make sure your emergency kill switch is set to "run". Now get in position where you can see the test plug firing end, pull in either brake lever and hit the start button. If it's firing as it should, you will see a nice blue arc dancing around. If not, then try holding the other brake lever and try again. Still no spark, then you know the engine is not firing. If you do see a spark and engine will not hit, then you know you more than likely have a fuel problem. Try that and get back to us. Good luck.