SOHC.co.uk Forums > CB500/550

550F charge issue?

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Sesman:
If you have a solid state reg/rec then the culprit is the regulating part of that unit, which is overexciting the alternator field coil. If the regulator field coil connections are open circuit you will have no change in rectifier output voltage.

So in short, as BryanJ has suggested…

Bristolbadger:

--- Quote from: Bryanj on March 05, 2023, 08:05:44 AM ---Only 2 things cause overcharge
1 duff regulator

2 volt sense wire at reg showing less than battery voltage

--- End quote ---
Ok that makes sense thanks Bryan. So if I'm to replace the unit which should I go for,

DS https://www.davidsilverspares.co.uk/CB750K3-FOUR-1973-USA/part_220371/

Or Electrex
https://www.electrexworld.co.uk/acatalog/RR24_-_Regulator_Rectifier_CB750F1_CB750K1-K7_CB750KZ.html#SID=439

McCabe-Thiele (Ted):
Plenty of warnings on the Electrex site about what battery types are suitable e.g. Not Lithium-Ion & downloadable fitting instructions.
Plus the Harness repair adapter if needed.

I like the original adjustable regulator on my 400.

Oddjob:
Electrex are Mosfet type Reg/Recs IIR, always preferable.

SteveD CB500K0:
Mosfets were cutting edge technology when I was a design engineer (early 80’s)

Surely there’s something better nowadays?


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