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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Anyone know anything about Auto Tempo 5" speedos?
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<blockquote data-quote="clevtrev" data-source="post: 6642" data-attributes="member: 187"><p>The Chronometric, hence the name, was made by Smiths, under licence from Jaeger of Paris, France. Where does one think metric came from ? </p><p><a href="http://www.vincentownersclub.co.uk/photos/showphoto.php?photo=3138" target="_blank">http://www.vincentownersclub.co.uk/photos/showphoto.php?photo=3138</a></p><p></p><p>I have posted here the early type of drive box, along with the commonly known and a modern BMC unit. </p><p>As you can see with the early type the drive spindle is attached to the chassis of the unit, and the drive box is clamped on to the chassis, the spindle stays in place. </p><p></p><p>One needs to realise that as the unit is metric, ALL of it and everything is metric. So don`t believe all you read in some books. In KTB it tells you that the holding bolts of the 3"unit are 0BA but 6mm wil fit. NO, the thread is 6mm and an 0BA nut will fit. Otherwise someone will have to re-write the standards and tell us that the BA thread angle is now 60 degrees, which is as written in KTB. Also the thread by which the cable is mounted on to the Speedo is M12 x 1mm pitch. So much for `There are no metric threads on your Vincent`. </p><p>Some also would like to know about the screw that fixes the case to the frame on the 3"unit, it`s M5 x .75 pitch.</p></blockquote><p></p>
[QUOTE="clevtrev, post: 6642, member: 187"] The Chronometric, hence the name, was made by Smiths, under licence from Jaeger of Paris, France. Where does one think metric came from ? [url]http://www.vincentownersclub.co.uk/photos/showphoto.php?photo=3138[/url] I have posted here the early type of drive box, along with the commonly known and a modern BMC unit. As you can see with the early type the drive spindle is attached to the chassis of the unit, and the drive box is clamped on to the chassis, the spindle stays in place. One needs to realise that as the unit is metric, ALL of it and everything is metric. So don`t believe all you read in some books. In KTB it tells you that the holding bolts of the 3"unit are 0BA but 6mm wil fit. NO, the thread is 6mm and an 0BA nut will fit. Otherwise someone will have to re-write the standards and tell us that the BA thread angle is now 60 degrees, which is as written in KTB. Also the thread by which the cable is mounted on to the Speedo is M12 x 1mm pitch. So much for `There are no metric threads on your Vincent`. Some also would like to know about the screw that fixes the case to the frame on the 3"unit, it`s M5 x .75 pitch. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Anyone know anything about Auto Tempo 5" speedos?
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