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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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<blockquote data-quote="davidd" data-source="post: 111492" data-attributes="member: 1177"><p>Tim,</p><p></p><p>I am not sure this will answer your question, but I did not believe that the direction of the needle was related to the direction of the cable. I assumed the instrument itself was numbered and geared for the correct rotation of the instrument's needle or hand specified by the manufacturer regardless of the cable rotation. However, I have been using electronic tachs, so I am not that familiar with the cable to head relationships. </p><p></p><p>I am familiar with the rotation, which Smiths called "reversing or non reversing." The rotation is specified from the direction of the magneto armature as it is installed. A clockwise turning shaft gives anti-clockwise cable rotation. </p><p></p><p>The BG1507 series tach drives are available in 5 models: two 1:1's (reversing and non reversing) and two 8:1's reversing and non reversing. The Vincent is the one in the middle, BG1507/3, which is the 4:1 reversing. There is no 4:1 non reversing model in this series</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 111492, member: 1177"] Tim, I am not sure this will answer your question, but I did not believe that the direction of the needle was related to the direction of the cable. I assumed the instrument itself was numbered and geared for the correct rotation of the instrument's needle or hand specified by the manufacturer regardless of the cable rotation. However, I have been using electronic tachs, so I am not that familiar with the cable to head relationships. I am familiar with the rotation, which Smiths called "reversing or non reversing." The rotation is specified from the direction of the magneto armature as it is installed. A clockwise turning shaft gives anti-clockwise cable rotation. The BG1507 series tach drives are available in 5 models: two 1:1's (reversing and non reversing) and two 8:1's reversing and non reversing. The Vincent is the one in the middle, BG1507/3, which is the 4:1 reversing. There is no 4:1 non reversing model in this series David [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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