He should have kept his mouth shut about going closer to half of 205, but it's smart to plead not guilty if he can prove that it was impossible for his motorcycle to go even close 205 MPH. Once he does that it's case closed.
Huh. Case closed if they can prove he wasn't going 205?
I know common sense doesn't spend much time in the vicinity with respect to matters of law, but it would seem reasonable to conclude that speed-determining devices haven't been around nearly as long as reckless driving.
In other words, an officer's word ought to be sufficient for this guy's license to get yanked for a good long while, rather than weaseling out on a technicality like "I was only going 191.22569905, not 205.. neener neener neener!!!"