wont start

[H92CR250R]

04 crf450r it has compression and sounds like it wants to crank any ideas??

[davidl9999]

Wrong day to try starting it??? ?

Seriously though, how about some more details. Old gas? new gas? been sitting a while? rode it the day before? Ran like crap for a week then quit? Any spark? Popping? What IS the compression (actual numbers) please.

[rmoore0852]

When did you last check valve clearances? What are they now?