my 2007 Grizzly 700 just died while in middle of a run. we towed it no problem. but when i try to start it seems like it is locked up

 

Make sure the battery is ok. Pull the spark plug and then see if the engine cranks over and has spark. If it still doesn't turn over, pull the stator cover and see if you can turn the flywheel by hand. If you can't, then it sound like a mechanical problem.