SOHC.co.uk Forums > CB500/550

Reprofiled camshaft

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davidcumbria:
What is the change in timing you refer to Ken ? Ignition or valve ? I would have thought the optimum ignition timing may well be different from the mark due to the change in petrol composition over 50 years.

DomP:
I'm still tempted to get mine done while I'm spending so much doing an engine rebuild.  What are the reprofiling details I'd need to pass on to Newmans Ken?

Sesman:
See post 43. It’s what I used. http://forums.sohc4.net/index.php?topic=134461.0

Reply #14

Don’t move until Ken comes back.

DomP:

--- Quote from: Sesman on October 27, 2023, 12:20:32 PM ---See post 43. It’s what I used. http://forums.sohc4.net/index.php?topic=134461.0

Reply #14

Don’t move until Ken comes back.

--- End quote ---

Thanks for that, I'll be honest I don't quire understand the figures .

Oddjob:
5 degrees of overlap and 10 degrees of duration is the recommended settings to give to Newmans. They have confirmed they can do this.

I'll detail the timing issue later 

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