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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Exhaust Washers
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<blockquote data-quote="davidd" data-source="post: 177148" data-attributes="member: 1177"><p>A great number of Vincent heads have undergone extensive welding without any issues. For that matter, a friend of mine has been welding both BMW and Vincent Heads for forty years. I have also discussed this with flow-bench mechanics who do many hours of welding on all sorts of heads. They say that cylinder heads can go bad, but it rarely happens. The head will withstand a large number of heat cycles before it goes soft. I would trust a well-respected welder to answer that question.</p><p></p><p></p><p></p><p>I ordered oversize exhaust nuts from Coventry. I had a stock nut that went fully into the head without touching a thread. With a 0.005" oversize thread the thread engaged immediately and locked the stub in tight, so it fit perfectly.</p><p></p><p>[ATTACH=full]61245[/ATTACH]</p><p></p><p>From right to left, the plus 10, the plus 5 (with lock wire holes that I drilled), and the stock Vincent nut.</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 177148, member: 1177"] A great number of Vincent heads have undergone extensive welding without any issues. For that matter, a friend of mine has been welding both BMW and Vincent Heads for forty years. I have also discussed this with flow-bench mechanics who do many hours of welding on all sorts of heads. They say that cylinder heads can go bad, but it rarely happens. The head will withstand a large number of heat cycles before it goes soft. I would trust a well-respected welder to answer that question. I ordered oversize exhaust nuts from Coventry. I had a stock nut that went fully into the head without touching a thread. With a 0.005" oversize thread the thread engaged immediately and locked the stub in tight, so it fit perfectly. [ATTACH type="full" alt="DSCN7468 01.JPG"]61245[/ATTACH] From right to left, the plus 10, the plus 5 (with lock wire holes that I drilled), and the stock Vincent nut. David [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Exhaust Washers
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