SOHC.co.uk Forums > CB500/550

Was over charging now under. 16.7v to 12.2v

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Bryanj:
The earth on the reg/rec needs to be excellent as does the sensed voltage (normally black wire) need to be the same as battery

totty:
I don't think I checked the earth,  I'll have look at it as well.

totty:
I've got new terminals, terminal cleaning tools, dialectic grease and half a used CB650 loom on order. That lot combined with the guidance I've received on this thread should be all I need to get it sorted.
Thanks everyone. I'll post results.

totty:
Still won't charge at more than 12.2. Drops to 11.9 if the lights are switched on.

Ignition switch wiring wasn't as bad as I thought, cut out one bit of corrosion where I think a scotch lock had been, sorted out the badly soldered red wire.

Black voltage sense wire is just 0.04v below battery.
Reg/rec earth to battery is 0.7ohm as is red to black at ignition switch. The meters leads show 0.6ohm which implies the tested wires are just 0.1.

All connectors are clean and tight.

I think I'm going to have to retry the old reg and rec, but lost patience and went home for beer and motogp qualifying.

Unless I work on it again tomorrow it'll be 2 to 3 weeks till the next attempt.

totty:
Charging now within spec. The points gap on the original regulator was far smaller than spec.
Carbs balanced while I was on.

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