One of the best anywhere is about 20 miles south. In Waterford. Phil's Cycle Shop, AKA "The Honda Doctor", 1426 Crescent Lake Rd, Waterford, MI 48327. (248) 673-6247 . You will find nothing but classic Hondas in his shop. I'll warn you though... Don't pretend to be an expert, and don't lie. If you did something to screw something up, don't tell him it just happened on its own.
I will warn you that he does not work cheap. He knows about everything there is to know about SOHC hondas and I'm sure that you can't find anything that he hasn't already done. Also-don't take in your bike/part all crudy with oil and mud.