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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Identifying cams
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<blockquote data-quote="timetraveller" data-source="post: 178719" data-attributes="member: 456"><p>Jim, that suggests to me that the hole through the cam pinion is not perpendicular to the face of the cam wheel. Unless you find something like swarf in the hole I would suggest scrapping the wheel. The thought of a cam pinion wobbling in and out by ten thou causes an attack of the conniptions to me. Regarding what type of cam you have then it is not hard, but it is tedious, to find out. Just use the degree wheel and DTI method and measure the valve lift every ten degrees of engine rotation. Over the years there have been some rubbish cams made for Vincents and unless you know the history of these cams it is better to be safe. It will only take an hour or two to do the measurements, put them into a spread sheet and plot a graph. You can even get the spread sheet to calculate the speed and, more importantly, the acceleration of the valve due to the cam. I can help you with this if needed, via email, but it is not hard to do.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 178719, member: 456"] Jim, that suggests to me that the hole through the cam pinion is not perpendicular to the face of the cam wheel. Unless you find something like swarf in the hole I would suggest scrapping the wheel. The thought of a cam pinion wobbling in and out by ten thou causes an attack of the conniptions to me. Regarding what type of cam you have then it is not hard, but it is tedious, to find out. Just use the degree wheel and DTI method and measure the valve lift every ten degrees of engine rotation. Over the years there have been some rubbish cams made for Vincents and unless you know the history of these cams it is better to be safe. It will only take an hour or two to do the measurements, put them into a spread sheet and plot a graph. You can even get the spread sheet to calculate the speed and, more importantly, the acceleration of the valve due to the cam. I can help you with this if needed, via email, but it is not hard to do. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Identifying cams
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