The Fastest Highway Patrol Car in Alabama

[the Ferret]

I've said it before, motorcyclists like to make things soooooo complicated.

[GoldOxide_imp]

NO vehicle speedo is accurately calibrated... and intentionally always shows speed higher than travelled.
The faster the vehicle goes, the bigger/higher the error.
This slight difference in accuracy is done on purpose to avoid lawsuit against vehicle manufacturers.
There are other aspects as well such as different tire size and wear of the nominal tire during operation, simple physics.

Seems many folks over at the Africa Twin forum get the "healer" added to their ECU to fix any errors - of course valid until they change to a different brand of tires, and/or change the sprocket counts.