Ok so I was riding at the dunes sunday, everything was fine it was running great. I came into camp, parked it and when I came back to start it up, nothing. Just tested the compression, read at 70. I have no idea whats wrong with it. Any ideas? I was told it could maybe be the power valve? The guy who told me that it might be the power valve wasn't too familiar with them. SO what exactly is a power valve and what does it do?? Thanks everybody!