i just bought my 1993 vmax 4 and really enjoy it.im just take it for 2 drive for now ...run relly good in a hard trail or little bit of snow but as soon i go of trail fresh snow the engine lost almost all is power...the engine almost die..just let it idle for 30 sec and full power back...give some more trothle and lost of power again..finelly get back on the trail and full power back as long i dont go off trail....can somebody help me please