A buddy was riding his Warrior at dunes last year and quad all of a sudden quit. would not start. Replaced spark plug still no help. You can see spark, and it looks ok, so we tried to push start it. After a lot of pulling it around it will start and run, but if you let it die and sit for longer than 5 min, it won't start again. Thought it was compression, and compression test was terrible. So this winter we rebuilt top end, everything went well, timing is good but still won't start. Not even w/starter fluid. Did not try to push start, but assuming same results as before, could this be stator or some other electrical problem? Haven't performed meter readings on electrical yet, but wanted to get some input from you guys before chasing wrong problem. I know it's a four stroke, but thought some of you might be able to help. Sorry for the book.