Speedometer calibration

[Bob_Defly]

Is there a specific brand of speedo recalibration that is better than others? I have a bike with the gear ratio changed but want to correct the speedo too. Any recommendations?

[bogie]

Have only used the Healtech one myself, easy to install and setup,works great

https://www.healtech-electronics.com/products/sh/

[moto_traxport]

The original one for me - Yellow Box.

https://yellr.com/yb_home.htm

Correct the standard speedo or accommodate new gearing / tyre profile etc