He's gonna need one of those internal cylinder braces.
My implementation uses just straight bores through the brace but any proper engineer could improve it 3X with just good practices, eg. (fit) milling, dowels, optimal thickness, perfect material, etc.Pressurizing it and doubling the firing impulses are as far from the Kawasaki engineer's minds as east is from west, to paraphrase. ARP studs, brace and copper gasket will help. Is there enough meat to dowel the brace to the head? Or just a precision bore, matched to the bolts/studs?
He knew that the pistons pump the same CC going both up and down. Technically, his design could have equal or greater compression beneath the piston than above - which has never been achieved in two strokes without supercharging, and superchargers take a lot of horsepower to drive. Two strokes use the down "compression" of the piston to pressurize the entire crankcase, said pressure entering the combustion chamber via the transfer ports. The mushroom piston, with combustion chamber above and compression chamber below, greatly increases the pressure of the mixture flowing through the transfer ports, so smaller transfers are needed. The injector is placed and timed to take advantage of this. Very little unburnt mixture is lost out the exhaust, so emissions are far less. Thus, there could be an emissions legal two stroke street bike.Is this the most heavily modified 500 on the internet?? This fella made his own pistons.