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1939 Model 18 speedo

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1939 Model 18 speedo

Posted by andy_pennell at March 31. 2017

Can anyone please let me know if a Smiths S433/1/L speedo is the correct one for my 1939 Model 18

thank you

Re: 1939 Model 18 speedo

Posted by richard_payne at March 31. 2017

Almost certainly not, if that number is on the dial as it was a post-war practice.

As far as I'm aware, Norton offered their customers some choice but the norm was an 80 mph instrument with trip and illumination.

At the time, these still had the Jaeger Patents Smiths 'MA' logo and the yellow 30mph line.

They have a steel dial and the spigot fixing rather than screw cable (with the 'thick' sprung cable outer).

Most chronometrics will work though except that some oddities such as pre-war Royal Enfield had a drive in the opposite direction.

Attachments

Re: 1939 Model 18 speedo

Posted by andy_pennell at April 01. 2017

Good morning Richard

Thank you for coming back to me, please see attached image clearly showing S433/1/L but no Smiths logo, my bike was built in March 1939, does this help please

Many thanks

Andy

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Re: 1939 Model 18 speedo

Posted by andy_pennell at April 01. 2017

Hi Richard

another close up image attached

Many thanks

Andy

Attachments

Re: 1939 Model 18 speedo

Posted by richard_payne at April 01. 2017

Definitely a post-war dial.

Is it working ? If not and you are having an overhaul, most of the UK repairers will rebuild to whichever style you want although you may be restricted to retaining the later (1941 onwards) cable type.

Pre-war dials did not show the type number - this was on an aluminium plate screwed to the reverse which was not visible when mounted.

Re: 1939 Model 18 speedo

Posted by boo_cock at April 01. 2017

How do you know it had a speedo fitted originally? September 1938 onwards a speedo was compulsory, but prior to that it was a factory extra.

Failing that, you can get a good repro or second hand or from speedo repairs as I did with my '39 ES2.

Re: 1939 Model 18 speedo

Posted by boo_cock at April 01. 2017

How do you know it had a speedo fitted originally? September 1938 onwards a speedo was compulsory, but prior to that it was a factory extra.

Failing that, you can get a good repro or second hand or from speedo repairs as I did with my '39 ES2.

Re: 1939 Model 18 speedo

Posted by richard_payne at April 01. 2017

The 'optional' speedo, horn and pillion equipment aspect was more of a purchase tax fiddle than anything else (buy them afterwards and avoid the extra tax).

Buyers did fit cheaper horns and Halfords or Brown Brothers pillion equipment but there wasn't much competition for Smiths.

A non-illuminated and / or non trip is a distinct possibility but if you're a rivet-counter then the Jaeger patents dial and associated cable connector is the correct thing to be looking for.

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This message board is a technical forum for Nortons in general. Club related and non-technical items should be put in News and Views and if posted here, will be deleted

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