'13 CF moto 500 was rolled backwards down a hill with me last year.  ATV sat all winter while I healed, now I try to start it, no luck.  Battery is good, 12.7 volts, gas was unleaded premium,  and stabilized. When it ran there was always a humming/buzzing noise when you first turned key to run/start mode, that's gone.  When attempting to start the cable from positive Battery to starter relay mildly buzzes...ok ready for help and advice.  Thanks!!
Big Bob