I have a 1942 BSA M20 that I am almost finished restoring and I need a speedometer. I cannot afford an original Smith speedometer right now so I was looking at getting a replica for the time being. I would like to know what the specs are going to have to be for the appropriate speedometer. Like the ratio and if the replicas will do.
Have a look at http://www.beckelektronika.nl/ Unfortunately the site is in Double-Dutch but Hans Beck will reply to all questions in English beckelektronika@planet.nl.
Go to "snelheidsmeter toerenteller" and there you see the possibilities; you will need the middle dial.
