I have a 2004 honda xr250r was riding for about 5-6 hrs straight at Hollister after i did a valve adjustment, was trying to hit a small jump and heard a snap, then my engine died, i was able to bump start it once going down the hill but my motor died again. since then i wasn´t able to start my bike. When i go to kick start my bike, i don´t feel compression and can´t find top dead center like before, i checked to see if all 4 of my valves move, and they do. i pulled out my spark plug and checked to see if i had pressure when i go to kick start it, and i do. What do you think is wrong with my bike, have you had this happen before, and if so what did you do?