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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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<blockquote data-quote="oexing" data-source="post: 177754" data-attributes="member: 1493"><p>Not unexpectedly I did it with my available Sony encoders and DRO for finding equal lift of Andrews cams. But main point is to mark your cam gears and do chisel marks on engine case at some places closest to gears for refinding equal lift next time. This will be handy as long as you don´t change cams or gears certainly. So then you don´t do the puzzle games with old marks on half time, idler and cam gears at one position. Due to hunting tooth design all marks are useless once you turn the crank. With my marks on gears and case you can see alignment all the time for checking. Just after marking cam gears you set crank to TDC - or 4 degrees before as in Vincents - no half time gear on yet - set rear cam to marks - idler can be put in of course, then find one position of half time gear plus its slots and crank slot for key to align with the idler and rest. </p><p> Then advance the crank for one turn plus 50 - 4 degrees for front TDC and put in the front cam at marked position. The front gear should be allright when marks align. You´d have to press out the cam and try with corrected position if it is too much off. </p><p> But then, I am writing from memory, so better check everything yourself. My main point is to have marks on cam gears PLUS case for handy checks. </p><p> Erk, what is that extension on the magneto gear, for some engine breathing ?</p><p></p><p> Vic</p><p>[ATTACH=full]61504[/ATTACH]</p><p></p><p>[ATTACH=full]61505[/ATTACH]</p><p></p><p>[ATTACH=full]61506[/ATTACH]</p></blockquote><p></p>
[QUOTE="oexing, post: 177754, member: 1493"] Not unexpectedly I did it with my available Sony encoders and DRO for finding equal lift of Andrews cams. But main point is to mark your cam gears and do chisel marks on engine case at some places closest to gears for refinding equal lift next time. This will be handy as long as you don´t change cams or gears certainly. So then you don´t do the puzzle games with old marks on half time, idler and cam gears at one position. Due to hunting tooth design all marks are useless once you turn the crank. With my marks on gears and case you can see alignment all the time for checking. Just after marking cam gears you set crank to TDC - or 4 degrees before as in Vincents - no half time gear on yet - set rear cam to marks - idler can be put in of course, then find one position of half time gear plus its slots and crank slot for key to align with the idler and rest. Then advance the crank for one turn plus 50 - 4 degrees for front TDC and put in the front cam at marked position. The front gear should be allright when marks align. You´d have to press out the cam and try with corrected position if it is too much off. But then, I am writing from memory, so better check everything yourself. My main point is to have marks on cam gears PLUS case for handy checks. Erk, what is that extension on the magneto gear, for some engine breathing ? Vic [ATTACH type="full"]61504[/ATTACH] [ATTACH type="full"]61505[/ATTACH] [ATTACH type="full"]61506[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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