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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: 109473" data-attributes="member: 456"><p>Sorry Gary but I do not have any useful suggestions. I wrote on here years ago about my experience with Armours when I bought two sets of twin pipes off them. The stub pipes for the rear pipe and silencer to fit into were the same diameter as the main pipes, the junction for the rear pipe to the long pipe was in the wrong place and the hole in the main pipe for gasses from the rear pipe to enter was less than half the diameter it should have been. I took them back and offered to take a bike over there to act as a jig and was told that it was not necessary as they had a local Vincent owner who would help. Information on this forum more recently has suggested that they have improved but your experience, all the worse because of your distance from them, suggests that there is still a serious problem.</p><p>For years Bob Culver has been making the exhaust systems in steel using the original Vincent works jig. This is now more than 70 years old and was not in good condition 20 years ago. I have heard that the Spares Company has recently got someone else to make the pipes but whether this is correct only they can tell us. Anyone who has seen a modern tube bending machine in action will tell you that once the program has been set up then every pipe will come out the same to within thous. Moreover the machines are so powerful that they do not care whether it is steel or stainless steel which is being bent. Remember this is all thin walled tube. One of my other hobbies is sailing and I have seen these machines extrude s/s tube for marine use writhing around like a snake and even bending back on itself. I have no influence over the Spares Company but if I had then I would urge them to move to a modern tube bending firm and get the pipes made in sets of twenties. (When I get parts CNCd they do not like to make less than ten at a time). Exhaust pipes must be something that they can guarantee to sell so money invested on these would be like money in the bank.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 109473, member: 456"] Sorry Gary but I do not have any useful suggestions. I wrote on here years ago about my experience with Armours when I bought two sets of twin pipes off them. The stub pipes for the rear pipe and silencer to fit into were the same diameter as the main pipes, the junction for the rear pipe to the long pipe was in the wrong place and the hole in the main pipe for gasses from the rear pipe to enter was less than half the diameter it should have been. I took them back and offered to take a bike over there to act as a jig and was told that it was not necessary as they had a local Vincent owner who would help. Information on this forum more recently has suggested that they have improved but your experience, all the worse because of your distance from them, suggests that there is still a serious problem. For years Bob Culver has been making the exhaust systems in steel using the original Vincent works jig. This is now more than 70 years old and was not in good condition 20 years ago. I have heard that the Spares Company has recently got someone else to make the pipes but whether this is correct only they can tell us. Anyone who has seen a modern tube bending machine in action will tell you that once the program has been set up then every pipe will come out the same to within thous. Moreover the machines are so powerful that they do not care whether it is steel or stainless steel which is being bent. Remember this is all thin walled tube. One of my other hobbies is sailing and I have seen these machines extrude s/s tube for marine use writhing around like a snake and even bending back on itself. I have no influence over the Spares Company but if I had then I would urge them to move to a modern tube bending firm and get the pipes made in sets of twenties. (When I get parts CNCd they do not like to make less than ten at a time). Exhaust pipes must be something that they can guarantee to sell so money invested on these would be like money in the bank. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
poor quality repop silencers
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