Topic: Solid State rectifier/regulater conversion

[ilmod1]

I am restoring my father's 1975 CB750F that had been sitting in storage for 20 years and I keep draining the battery while adjusting the carbs etc. I am only getting 12 volts at idle and a unstable 13 volts at 4k rpms. It has the original mechanical regulator and large diode rectifier. I am about to replace them with ElectroSport ESR240 Regulator/Rectifier. Does anyone have any pointers about wiring or this manufacturer, anything I should look out for?

[PeWe]

You can get the old stuff to work fine again. Clean all contact points in connectors involved from alternator to  regulator and rectifier. Make a service of the regulator as described in the manual, adjust it and you'll get 14.5V when you should.

I had bad charging too after over 20 years of no use, mostly in dusty barn.

[Jerry Rxman Griffin aka MuthaF'er]

I expect you are using a new battery? If not put a full charge on it and have it load tested. Are you keeping it on a tender? These  batteries do not have a lot of excess capacity. The system does not begin charging until 1700 rpms.