I was riding at Sand Lake, OR yesturday and fell over and about sanded my arm in two. When I got back on the 03 WR450 it stalled. I tried to kick it over but it was solid, would not turn over. The electric start sounded like it was just spinning also. I rocked it back a bit and the kickstarter finally let loose but would not start, just kept turning over the engine. Pushed for about 2 miles when a quad pull-started me and I rode it back to camp. It ran normally the mile or so I had to go but it would not start back up! What is the problemo. Thanks for any leads.