i have a 1995 yz 250 i am haveing problem starting it i ave a good spark good compression and fuel and check timeing it just will not fire up i tryed and tryed that hard i hurt foot lol can any1 help me please

Try a new spark plug first, better still warm the plug in the oven until its hot, then fit it quickly and try again.

It would be best to remove the old plug and leave it out overnight to allow the flooded cylinder to evaporate

I ave just tryed that no luk

leave the plug out overnight and try it again