N15 speedo question

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Feb 23, 2020
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I’m fitting a chronometric speedo to my N15CS using the stock speedo drive.
Would the stock speedo cable fit, if not what do I use?
 
I think you need to have a cable that has a speedo end correct for the chrono which I believe is different than a magnetic.
This may be only true for the chronos fitted to Commandos though so check with a chrono rebuilder.
 
Would the stock speedo cable fit, if not what do I use?

Assuming you already have the Chronometric then check the square (should be 1/8" ) drive end of the existing inner cable fits the recess in the Chronometric without bottoming (so no more than 7/16").

However, there are many types of "Chronometric" and not all are likely to have the same drive ratio or direction of cable rotation as the original BG5330/257 2:1 reversing drive gearbox (for the SSM3001/00 magnetic speedo).
 
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