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#235214 - 01/30/09 4:38 am Smiths Chronometric Speedometers: What do the Numbers and Letters Indicate?  
Joined: Aug 2001
Posts: 6,672
Jon W. Whitley Online content
Jon W. Whitley  Online Content



Joined: Aug 2001
Posts: 6,672
Vermont
I have been researching and cannot find a reference for Smiths chronmetric speedo's or and instruments concerning what anything stands for.

As an example, most if not all of the Triumph numbers for 1940's through 1950's models for big twins end with an L. Such as S467/99/L .

I am looking at a speedo that is S467/163/N

I am leaning toward the indication that the letters may indicate clockwise or anti-clockwise rotation and or gear ratio, such as 2:1 or 4:1 ?

Anybody who has knowledge of these numbers and letters, please let me know??? Also want to know what the set of numbers preceeding the letter means?


Jon W.


1957 6T Thunderbird 650
1968 T100R Daytona 500
1971 TR6R Tiger 650
1970 BSA A65F 650
1955 Tiger 100 - Project

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#235342 - 01/30/09 10:09 pm Re: Smiths Chronometric Speedometers: What do the Numbers and Letters Indic [Re: Jon W. Whitley]  
Joined: Jan 2006
Posts: 343
Beljum Offline
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Beljum  Offline
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Joined: Jan 2006
Posts: 343
Ohio

JW^2,

Here is a link that may give you some info and a start to crack the “chrono code”. I might have a look at it later and look for your number, I’m gonna go eat some oven fresh homemade pizza now!!

http://www.mc-albion.dk/AMC/Technical/Speedo/Smiths_Motor_Cycle_Equipment_1954-1958.pdf


Bel


Go for a ride on a preunit laugh

September 2010 Cuyahoga Valley Ride

'55 "The Mighty 6T", '73 Commando in boxes, '01 DR650, '90 CR250

#235377 - 01/31/09 4:07 am Re: Smiths Chronometric Speedometers: What do the Numbers and Letters Indic [Re: Beljum]  
Joined: Aug 2001
Posts: 6,672
Jon W. Whitley Online content
Jon W. Whitley  Online Content



Joined: Aug 2001
Posts: 6,672
Vermont
Thanks Bel,

That is some real good info to have. Looking through it, I cannot find a reference differentiating between L and N and what the difference is. I will keep looking though as it may be in there and I am missing it !!

beerchug


Jon W.


1957 6T Thunderbird 650
1968 T100R Daytona 500
1971 TR6R Tiger 650
1970 BSA A65F 650
1955 Tiger 100 - Project


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