Ok, i am having a heck of a time trying to figure out what is wrong with my 2007 660 rhino. I was driving it through a field and it suddenly lost power. It didnt stall right away it just wouldnt pick up speed. I shut it off and now it wont start. it rolls over fine and backfires but wont start. I called a local dealer and he told me that i probably burnt the valves. I tore it down and the valves are fine. The piston is in good shape and the cam looks good. Im trying to put it back together now but dont know how to set the timing. if anyone knows how i would really appreciate some feedback on how to set it. Also if anyone has any ideas about what could be wrong and why it lost its power i would really appreciate any help you could give me.