Author Topic: Correct Smith Chronometric rev counter for Super Rocket  (Read 2840 times)

Offline sprint

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Looking a 1960 SR with twin clocks. The rev counter is driven from the oil pump.

Normally fitted is a RC 1303/03 but the one I'm looking at has a RC 95 fitted.

Can anybody advise if a RC 95 and 1303/03 are interchangeable as I cant find any spec or details on a RC 95?

Offline wilko

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Offline sprint

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http://www.flickr.com/photos/9383961@N05/3025208238/in/set-72157608955201989/

Thanks for the very useful link Wilko.

However, it does not help with the question as to whether the RC 95 is a correct rev counter for an oil pump driven Super Rocket as it does not list it?

Offline wilko

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Is it reverse drive or normal? Stick an old piece of cable in it and spin it. Looks like it's for a Matchy or AJS twin. http://www.flickr.com/photos/9383961@N05/2981803167/in/set-72157608455625820

Offline Brian

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This might not be much more help but....

BSA's use a RC83 when its driven by the magneto pinion, unfortunately I cant find a listing for the oil pump driven ones. The RC1303/03 is a 3:1 ratio anti clockwise.

The RC95 will fit most Velocettes, Nortons and AMC twins (AJS/Matchless)


Offline wilko

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If you go down this list to Smiths there are different years for the instruments. I was too lazy to go through them all!  http://www.flickr.com/photos/9383961@N05/collections/72157606126399856/

Online BVSR

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Sprint,
The RC95 is 4-1 clockwise, so they are not interchangeable. The 1303/03 is the only 3-1 anticlockwise that Smiths made so You have to find one or a specialist can convert some other clock to 3-1 acw to You.
Markku
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