Two speedos - question

[farmer58za]

Hi guys
I have two speedos here for my 250 KTM's. One is marked in km/h and the other in mph. Both speedos are stamped 11/74. Descriptions as follows.

speedo 20/109/07 w=0.88 marked to 140 km/h has white ring around face

speedo 20/109/12 w=1.42 marked to 120mph has plain black face

I take it that either of these speedos may have been installed on identical bikes depending on the country of destination. Is that correct?

Regards

David
'75 KTM GS250
'75 KTM GS400

[Doug Wilford]

David;
You are correct, the 1.42 ratio was used in the US for the front wheel drive VDO Speedometers.   COuldn't tell you for sure about the k/mph but the ratio would make it work that way

[Mike OReilly]

There's approx. 1.6 km. in a mile (just off the top of my head) so 1.6 X .88 equals approx. 1.41.
That would seem to indicate that both these speedo heads would be set up for the same axle drive. Which of course makes sense.
Mike

[farmer58za]

Thanks for the help

Regards

David
'75 KTM GS250
'75 KTM GS400