V85 Speedometer inaccuracy

[SIR REAL ED]

What I’m pondering is..
The sensor that reads wheel rpm gets its data from the tone wheel providing pulse signals up the wire.
The ABS and TC cleverly do their work by comparing differing front/rear wheel rpm.
If I made two more tone wheels with a 6% different number of slots than the standard ones and fitted them front and rear, the ABS and TC would be happy because the wheel rpm’s would be correct compared to each other, but the speedometer would be getting 6% less pulses at a true 100 kph than is currently the case.
Instead of the tone wheel thinking it was at 106 k’s, it’d think 100 k’s.

Very clever!

Go for it and show pictures!

[Moparnut72]

I followed that thread closely because the inaccuracy of my furrin motorcycles was driving me nuts. I was surprised to find that the mileage recorded is pretty close to correct but the speed is way off. I am tired of government nannyism. My wife's Wagoneer has a warning bell that chimes when the speed limit is exceeded by 3 mph. It is kind of a good thing but annoying. Fortunately it can be turned off. My wife likes it as she can have a heavy foot, gotta keep that 6.4 Hemi under control.
kk

[Kiwi_Roy]

A link to the similar thread re V7 speedo correction.

https://wildguzzi.com/forum/index.php?topic=123255.0

[Kildareman]

53, 64, 85, 106, 127 km/Hr indicated gives true 50, 60, 80, 100, 120. It does limits here in Ireland. Obviously there's a little rounding but well within limits that would get you noticed.