What are the specs for the diode? I've got the same issue on my 77.....
Thanks,
Pat
They are still available from Honda:
http://www.hondapartsnation.com/oemparts/p/honda/31700-124-008/rectifier-assy-silicon-stanleyI had found a source for $10 each, but I would have to do some research to find out where. I bought three of them at that price.
Edit: One of the other symptoms I was experiencing was that the starter would not engage in neutral with the clutch handle out. I would have to pull the clutch in, even in neutral, in order for the starter to engage. The diode (called "rectifier" on the parts fiche) is usually suspended from a little rubber grommet on the back of the battery tray, above the plastic inner fender. Just follow the wires up to it, it's hard to spot!