Hello.

Here is a Norris D grind camshaft up for sale fits 71-78 Honda cb500/550 models.

We purchased this camshaft in a buy-out years ago and didn't have the spec card with it.

The camshaft says Norris D grind scribed into it ...... we didn't look up the specs. 

The 3rd photo shows very slight rust pits which will not affect the running at all.

Thanks for looking.

Let us know if you have any questions or need more photographs.