SOHC.co.uk Forums > CB350/400

400/4 Battery not charging

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SteveD CB500K0:
That’s nowhere near enough.

When you charge it off the bike, is it the same?


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THUNDERDOWNUNDER:
The battery is only a few months old . So don’t think it’s that . When I bought the bike a few years ago the owner said there was a short somewhere . I have put a new wiring loom on . So it’s down to the generator or regulator/ rectifier

cooleronthecoast:
It does sound like the charging system is at fault, as Steve says you should be seeing a much higher voltage than you are at 4000 rpm

THUNDERDOWNUNDER:
With the battery loosing power over night where is the short ?

Bryanj:
Disconnect the 3 wires from the regulator, with ignition on check voltage at black reg wire with ignition on it should be same as battery voltage.
No more instructions till that andwer posted

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