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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Valve Springs
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<blockquote data-quote="Nigel Spaxman" data-source="post: 113887" data-attributes="member: 2907"><p>I have used the Terry Prince kit for two years now. At first they had way to much pressure and they wore out my cams. I then checked them and I think the seat pressure was about 125 lbs. I altered the top collars and I also had to relieve the insides of the valve caps that cover the valve springs. The seat pressure is still around 100 lbs which is a bit high. The pressure with the valve open is still rather high as well. I think that I would get new standard springs if I did it again. John was using rocker arms with a different ratio for more lift so he may have needed these springs with a bit higher pressure. My bike never floats it's valves anyway. I will look this winter and see how my cams are wearing now.</p></blockquote><p></p>
[QUOTE="Nigel Spaxman, post: 113887, member: 2907"] I have used the Terry Prince kit for two years now. At first they had way to much pressure and they wore out my cams. I then checked them and I think the seat pressure was about 125 lbs. I altered the top collars and I also had to relieve the insides of the valve caps that cover the valve springs. The seat pressure is still around 100 lbs which is a bit high. The pressure with the valve open is still rather high as well. I think that I would get new standard springs if I did it again. John was using rocker arms with a different ratio for more lift so he may have needed these springs with a bit higher pressure. My bike never floats it's valves anyway. I will look this winter and see how my cams are wearing now. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Valve Springs
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