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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Offset ET28 hole in ET25 for more valve lift
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<blockquote data-quote="johnmead" data-source="post: 52607" data-attributes="member: 776"><p>Greg,</p><p>You do not need to make new valves. I have made up new EW35s with a top hat shape and a longer body to correct the valve geometry. For valve springs, I am using beehive ones from R&D valve springs in California. They install at the same height as stock Vincent springs and allow .500 lift without binding. They also come with Ti retainers and keepers. I had a machinist cut the keeper groove in each valve using a tool post grinder to replace the Vincent circlip.</p><p></p><p>Now...has anyone dome what I asked in starting this thread. That is putting a offset bushing into an enlarged rocker pivot hole to give some offset and higher lift and what offset did you use and what was the increase in lift?</p><p></p><p>John Mead.</p></blockquote><p></p>
[QUOTE="johnmead, post: 52607, member: 776"] Greg, You do not need to make new valves. I have made up new EW35s with a top hat shape and a longer body to correct the valve geometry. For valve springs, I am using beehive ones from R&D valve springs in California. They install at the same height as stock Vincent springs and allow .500 lift without binding. They also come with Ti retainers and keepers. I had a machinist cut the keeper groove in each valve using a tool post grinder to replace the Vincent circlip. Now...has anyone dome what I asked in starting this thread. That is putting a offset bushing into an enlarged rocker pivot hole to give some offset and higher lift and what offset did you use and what was the increase in lift? John Mead. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Offset ET28 hole in ET25 for more valve lift
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