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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
poor quality repop silencers
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<blockquote data-quote="timetraveller" data-source="post: 109555" data-attributes="member: 456"><p>Just heard from Bob Culver, who has been using the original Vincent jig for years to manufacture exhaust pipes for twins and singles. It seems that what I wrote above in #138 about the jig being worn out is not correct. It turns out that a worm and worm wheel in the jig which is used to drive the tube through various formers was worn out but the parts of the jig, weighing hundredweights, which locate the ends of the pipes to ensure that they should fit the bikes are still in good order. The worm and worm wheel finally failed some time ago and have now been replaced with new parts so in the future the pipes should be easier to make and still fit. One thing that Bob did say, and this comes all the way from people who worked at the factory, was that were occasionally pipes which needed to be forced to fit but after a few weeks of heating and cooling the imposed stresses worked themselves out and then that set of pipes was good for years. This tip might be of use to some people who have trouble with some modern pipes. Apologies to Bob for any confusion.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 109555, member: 456"] Just heard from Bob Culver, who has been using the original Vincent jig for years to manufacture exhaust pipes for twins and singles. It seems that what I wrote above in #138 about the jig being worn out is not correct. It turns out that a worm and worm wheel in the jig which is used to drive the tube through various formers was worn out but the parts of the jig, weighing hundredweights, which locate the ends of the pipes to ensure that they should fit the bikes are still in good order. The worm and worm wheel finally failed some time ago and have now been replaced with new parts so in the future the pipes should be easier to make and still fit. One thing that Bob did say, and this comes all the way from people who worked at the factory, was that were occasionally pipes which needed to be forced to fit but after a few weeks of heating and cooling the imposed stresses worked themselves out and then that set of pipes was good for years. This tip might be of use to some people who have trouble with some modern pipes. Apologies to Bob for any confusion. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
poor quality repop silencers
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