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Hi Does anyone know the length of the original valves for these early Moore CS1s?
I have seen short and long spring sets by Paul Norman for these.
The bike currently has later ES2 valves fitted which have a bit larger head than necessary for the port.
Cheers
Paul
Valve lengths
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Have you tried contacting GandS valves?
they have drawings for most of the early Norton valves. They were very helpful to me with drawings for the flat tanker valves.
if you struggle I've a CS1 in bits so could probably measure for you.
steve