GPS-verified 191mph on my Hayabusa out in the desert east of San Diego (if you're going by your speedometers, you can probably drop 10% off your mph- manufacturers tend to have them err on the 'happy side')- I rarely took that bike out when I didn't break 150mph- looking back, I am surprised I survived it (and zero speeding tickets, which was a miracle).

I hit ~110mph on the only straight-ish piece of road on Koh Samui once on a CBR-900RR- ironically, it was exponentially more dangerous (and stupider) than my desert run.