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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Twin Cam Timing Conundrum!
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<blockquote data-quote="timetraveller" data-source="post: 90148" data-attributes="member: 456"><p>I've done this many dozens (possibly hundreds) of times, both for myself and others. It should work but measuring the exact time of the start of the lift is difficult. What I always try to do, although it is time consuming, is to plot a graph of the lift at every ten degrees of crankshaft rotation. I like to do this for the whole of the opening and closing including checking the base circle as they are not always round. You do not need to do the whole of the base circle at ten degree intervals and as an absolute minimum plot a graph for the start of the lift for at least 50 to 60 degrees of engine rotation. Remember that Vincent opening and closing times are taken at five thou lift, Let us know how it goes.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 90148, member: 456"] I've done this many dozens (possibly hundreds) of times, both for myself and others. It should work but measuring the exact time of the start of the lift is difficult. What I always try to do, although it is time consuming, is to plot a graph of the lift at every ten degrees of crankshaft rotation. I like to do this for the whole of the opening and closing including checking the base circle as they are not always round. You do not need to do the whole of the base circle at ten degree intervals and as an absolute minimum plot a graph for the start of the lift for at least 50 to 60 degrees of engine rotation. Remember that Vincent opening and closing times are taken at five thou lift, Let us know how it goes. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Twin Cam Timing Conundrum!
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