Impressive speeds! One thing i find hard to beleive is "Which speed is right" ... for example, i've tested my speed using: GPS, Bike speedo, and the "Your speed is" road sign .. all say different things!!
Speedo: Hops erratically between 10 and 50 (somethings really wrong with it)
Speed sign: 32
So personally i'm sceptical of bike speedos, the electro magnetic intereference that the bike creates can often trick the speedo into crazy stuff ..
So is GPS the most accurate? providing youre doing a constant speed for an amount of time on a straight road?