Man up and get a XC500? Really, do want this poor fellow to hurt himself?
I had one that was setup by the guys at Penrith for some A grader in 83 and Man up is an understatement! Elsewhere I said the 84 Honda CR500 was an Evil hand full but the 500XC was that and more. I have less than fond memories or spearing off a trail in an enduro (No retardation from front brakes)
but
it was the amount and type of power that makes me wish I had one today. Still not pre 78 but one hell of a Evo bike if you can find one I guess.
But I would start Jogging, cycling, weight Training and lots of practice practice practice if you want to be fast on one!