I have a CB500 in Lake Oswego, and I need to see if a 350F or 400F dipstick will fit in the 500. This would involve me dropping by (or meeting you somewhere) and doing a 20 second swap test. I'm trying to see if a temp gauge equipped dipstick designed for a 400 will fit in my 500!
Happy to bring some good brew as payment for your trouble. Might also be fun to find a fellow SOHC owner to do some riding with in this area.
Cheers,
Jason