Strange topic this one...do you say yes and look like a loon or say no and look soft in the eye's of the loon lol.
Well officially i can say yes i have broken the 170mph in Germany, I.O.M. and one or two tracks around Europe.
The fastest recorded speed was 181mph ( telemetry recorded) in the slipstream of a BUSA, not bad for a ZX9.
But lets be honest guy's most of today's modern plodders will get you over 170mph it's just picking the right time and place.
It's a real buzz at those speeds and a real shame that the laws of this country have not been updated (like the machinery we ride) and carry such a heavy penalty if you are caught there.
Anyway as a law abiding citizen of this wonderful country
i can't say i have ever broken a speed limit on a motorcycle
although there was the time i was sent on a driving course for my excessive use of a car accelerator
but that's another story.
Have fun trying peeps.