You are 100% correct on all points LoveMy... The mina is designed to make efficient power. The intake set up is night, and day over the ZX (af18). I had a jog I gave away a year or so ago simply because it was a tiny 10" wheeled scoot. I'm looking for a Mina long case w/ rear disc as we speak. I know I can get a new one for a few hundred but all I really need is the cases, and basic hardware. I just finished posting how I have no love for the ZX engine/bike. Like you said... It's what I have. I really want this build done so I can start on the next. Hand made frame, and Mina engine. I have my eye on the first part... A used Polini triple tree from SPI. 40.bucks The ZX was a learning tool to see what can be done.
