I just picked up a 1977 Super Sport XL( not running). My friend and I got it running kind-of, but 2 weeks later it won't turn over and start. It seems like there is no compression. When I pedal and hold in and release the handle to engage the motor there's nothing! Is there anyone the can help?! When we had it running it was a blast. It topped out at just over Forty mph! I would like to get it running again to street legal it!