Was riding my 98 CR250R and it died and i cant get it to start. I have kicked it about 50 times and all i could get was a back fire out of the muffler. Any ideas would be great. I also found i can use my hand to turn it over with ease.

 

When was the last time you put a new top end (piston, rings, etc.) in it. If its more that about 200 hours of ride time than you need to replace teh top end.