My 2 cents. YZ80 engines, are pipey little motocross engines that don't start making power till about 9000 rpm and sign off around 11,500, give or take 1000 rpm. And when the power band hits, a short wheel base mini, if it's hooked up, is probably going to flip over backwards.
I don't think it will be much fun to ride honestly. A GT80 engine would be a much better candidate, but a modestly built predator 212, even with a straight centrifugal clutch, will probably run away from it.