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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Engine Shock Absorber
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<blockquote data-quote="Simon Dinsdale" data-source="post: 116977" data-attributes="member: 58"><p>It is common knowedge that the spate of breaking tripplex chains mainly occured in the 1970's & 80's when the quality of primary chain went through the floor with Reynolds stopping the manufacture of motorcycle grade tripplex chain and quitely replacing it with industrial chain, usually with cheap split rollers. Why is it you never hear of Comets breaking primary chains which use the same ESA but a single row chain? Could it be because the single chain was still available as motorcycle grade?</p><p>The biggest problem with the Vincent ESA is it rubs against the outer main ball bearing during movement and slowly wears away and so moves the engine sprocket inboard over time. This then puts side load on the primary chain due to sprocket misalignment which is not good and Vic's BMW design will suffer exactly the same problem. I have seen twin engine sprockets which have worn right through the hard surface of this contact area and caused the sprockets to be out of align by over 1/8" which is not good on a tripplex chain which is inherently stiffer against sidewards forces than a single row chain. That and low quality chain is most probably why they broke.</p></blockquote><p></p>
[QUOTE="Simon Dinsdale, post: 116977, member: 58"] It is common knowedge that the spate of breaking tripplex chains mainly occured in the 1970's & 80's when the quality of primary chain went through the floor with Reynolds stopping the manufacture of motorcycle grade tripplex chain and quitely replacing it with industrial chain, usually with cheap split rollers. Why is it you never hear of Comets breaking primary chains which use the same ESA but a single row chain? Could it be because the single chain was still available as motorcycle grade? The biggest problem with the Vincent ESA is it rubs against the outer main ball bearing during movement and slowly wears away and so moves the engine sprocket inboard over time. This then puts side load on the primary chain due to sprocket misalignment which is not good and Vic's BMW design will suffer exactly the same problem. I have seen twin engine sprockets which have worn right through the hard surface of this contact area and caused the sprockets to be out of align by over 1/8" which is not good on a tripplex chain which is inherently stiffer against sidewards forces than a single row chain. That and low quality chain is most probably why they broke. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Engine Shock Absorber
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