speedo mph and kph

baz · Aug 17, 2015

whats the difference between a smiths mph speedo and a kph speedo did they just put a different face on the clock?,,,,,,,,,,,,,baz

L.A.B. · Aug 17, 2015

frankdamp · Aug 17, 2015

It's possible there's an mph face underneath the kph one.

johntickle · Aug 18, 2015

The worm gear for the odometer is also different.

baz · Sep 11, 2015

johntickle said:
The worm gear for the odometer is also different.

only just read this post i was wonderering about the odometer going from mph to km cheers for that ...........baz

L.A.B. · Sep 11, 2015

baz said:
johntickle said:

The worm gear for the odometer is also different.

Click to expand...

only just read this post i was wonderering about the odometer going from mph to km cheers for that ...........baz

And my apologies, I often forget about the odometer gearing.

frankdamp · Sep 11, 2015

I'd left N-V to emigrate to the US before the Commando was offered in the Metric market. I suspect that a different indicator was used with metric gearing, so that the speedometer and odometer would register the appropriate information, without the need to cbange the source data. A change to the speedo scale on the mph instrument would be simple, but the odometer would be a bigger problem.

L.A.B. · Sep 12, 2015

frankdamp said:
I suspect that a different indicator was used with metric gearing, so that the speedometer and odometer would register the appropriate information, without the need to cbange the source data. A change to the speedo scale on the mph instrument would be simple, but the odometer would be a bigger problem.

As far as the actual gauge is concerned it was just a change of scale on the dial face, MPH instruments reading to 150, and the km/h unit to 240, the odometers are geared to register +1 unit every 1000 cable turns for the MPH instrument, and 600 for km/h, as all Commandos had the same 1.25:1 (15/12) drive gearbox ratio.

speedo mph and kph

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