I used a degree wheel recently when doing some ignition work on my CA77 and found it helpful. This is a link for a downloadable 7 inch degree wheel. I printed it out on card stock. Thought I'd share it with you.
http://www.tavia.com/free_degree_wheel.html
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Latest Registry Entry
1965 Honda CP77 — Ulsan Metro City, Rep. Korea
Restored with original parts — Owner: J. Doe