I'm not at all surprised at the performance of the little YZ100 J,K, or L model (all the same bike for three years).
I can recall at Waaia (Shepparton) lapping 125's in practice , you just had to keep it on the gas use plenty of clutch, more so with a ported barrel because it didn't take much for it to fall of the pipe.
Short circuit (oiled track) we some times had combined 100 and 125cc races on club days and if you got the best possible jump out of the gate then you could drag race a 125 to the first turn and then the rest was up to you to just ride the wheels off it if you were looking to finish in the top 3.
December 2006 was the last ride day at the Waaia track as the gates were to be shut for the very last time since being opened in 1978.
Having owned a YZ100L (84) from new I decided to get the old girl out along with all my old rat gear and take it for one of it's last ever rides, it had been I think 15 years since it was last ever ridden.
Well the first thing to hit be was the absolute lack of bottom end, no brakes and butter soft suspension, so after a couple of laps on this moist red sandy track I was surprised at how well this bike still pulled for a 100cc after all those years and just the amount of speed you could carry through the corners and the ruts made it a heap of fun to ride......
So good on Doug Dubach and the little YZ100 for showing us what there both made of.
Regards
Rob Dick.