Re: Is my regulator no good ??

Posted by sgtslag on May 09, 2012; 3:53am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Is-my-regulator-no-good-tp3973039p3973112.html

Well, no offense intended, but I don't think your reading is valid.  The meter's test leads should be across the battery posts only; make certain that the Negative post is solidly connected to the frame of the bike -- set your meter to Ohms/Resistance, and check between the Negative battery post, and the engine block, which should read less than 3 Ohms.  The Regulator should keep the voltage below 15 VDC, when the engine is at 2k+ RPM (below 2k RPM, the alternator will not put out enough to charge, and the battery will drain).  Is your battery fully charged (should read at least 12.6 Volts, at rest -- being off of a charger for a couple of hours = at rest)?

There are aftermarket Rectifier/Regulator's available, made very heavy-duty, beefier than OEM, with OEM connectors (plug and play).  If you need one, we can point you in the right direction.  Let's try some troubleshooting first, though.  Get back to us when you verify the battery is fully charged; it has a good connection between the Negative post, and the engine block; and whether there is 13+ Volts across the battery terminals with the engine at 2k+ RPM.  If you prefer, download the FSM from the Home Page, and follow the troubleshooting instructions in it.  Cheers!