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General Chat (Vincent Related)
comet with unmarked timing gear
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<blockquote data-quote="Tom Gaynor" data-source="post: 1809" data-attributes="member: 4034"><p><strong>Comet with slipped timing.</strong></p><p></p><p>Welding is OK because the shaft and wheel are a good fit - if not good enough to grip. A friend from Shetland got back his irreplaceable Levis cam shaft ground minus 0.002 instead of plus 0.002. So he assembled shaft and wheel with bearing fit Loctite, and the assembly was still running four years later.</p><p> </p><p>You can time the motor by ensuring that lift is equal on both valves at or near TDC. Someone has just checked a set of Robinson cams (set on inlet opening 47 deg BTDC) and, yep, equal lift. I now know of four different performance cams (Norton, Honda, Rudge and Vincent) of which this is true. (I'm not claiming this as a triumph of personal research, I've been told it by others, and four camshafts later, believe it.)</p></blockquote><p></p>
[QUOTE="Tom Gaynor, post: 1809, member: 4034"] [b]Comet with slipped timing.[/b] Welding is OK because the shaft and wheel are a good fit - if not good enough to grip. A friend from Shetland got back his irreplaceable Levis cam shaft ground minus 0.002 instead of plus 0.002. So he assembled shaft and wheel with bearing fit Loctite, and the assembly was still running four years later. You can time the motor by ensuring that lift is equal on both valves at or near TDC. Someone has just checked a set of Robinson cams (set on inlet opening 47 deg BTDC) and, yep, equal lift. I now know of four different performance cams (Norton, Honda, Rudge and Vincent) of which this is true. (I'm not claiming this as a triumph of personal research, I've been told it by others, and four camshafts later, believe it.) [/QUOTE]
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comet with unmarked timing gear
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