[Martyn] is restoring a 32-year-old Honda motorcycle, so when the ancient speedometer broke last year ... horror of driving 40 LEDs with a single Arduino, [Martyn] bit the bullet and got a ...

The speedometer measures almost all the way to 240 kph which works well for a 24-hour clock too. With the major part sourced, he found an Arduino clone and hit the road (figuratively speaking).