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CB750 overcharging

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rocks

CB750 overcharging

Hi there,

This is a 1975 CB750F SuperSport

So I got Rick's rectifier/regulator combo, and now the battery is overcharging. Pass 15v at 4000rpm. I cleaned all connector, and still the same. I bought new handlebar controllers and ignition switch, but no luck (old once looked old and cracked). I took the harness apart. Removed the old wrap. Inspected every wire, cleaned connector again, and it still the same. I put HID xenon bulb with 35W, but didn't do much.

The battery is fairly new and fully charged. The thing that I don't get is when I connect the black wire straight from regulator to the positive(+) battery it charges perfectly at 14.5v.

Does this mean that I don't have issues with my stator?

I know I can't leave it connected that way, but what would be a solution for this?

The black wire starts from the ignition switch to front brake switch, starter switch, engine stop switch, winker relay, oil pressure light, neutral light, turn signal buzzer, horn, rear brake switch and then to the Regulator.

Will it work if I go from ignition switch straight to + battery?

Thank you

TOOLS1

Re: CB750 overcharging

Administrator

Over charging is most likely the voltage regulator is bad. Would not have anything to do with the stator. However I would double check your wiring to reg/rec.
TOOLS

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1976 CB 750-A X 2
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1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
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rocks

Re: CB750 overcharging

At first I thought it was just a bad rec/reg, or maybe it meant to be for a different bike. I sent it back, and I got a new one. And it does the same thing. So I think the rec/reg is good.