Aprilia RS 125 Private individual

The Aprilia RS 125 and Honda NSR 150SP were the closest things you could get to a Grand Prix bike at the time. But squeezing that much power out of a small two-stroke engine inevitably meant that the power delivery is all-or-nothing, meaning if you find yourself in the wrong gear twisting the throttle sometimes gets you nowhere until the narrow powerband arrives, then bam, on it comes in a rush, though the Honda is somewhat easier to live with on that front. Plus theres the uncompromising riding position and expensive maintenance. Just too hard.