SOHC.co.uk Forums > CB500/550

Charging problems

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dougie:
I have a charging problem with my F2.Ive had the bike 30years and its always been the same. Over the years Ive replaced just about every component of the charging system but the problem persists. Im repeatedly told its a common problem with these bikes but no one has ever told me the solution. Anybody out there been through this that might help? Ive replaced
rectifier / voltage regulator /fuse box / ignition coils even the field coil. I cant get a stator coil but the resistance readings on it are ok per haynes manual. Any ideas......?

metalcatfish:
I'm baffled by the problem your experiencing, I can only mention the same problems I had. Namely poor charging due to: One corroded connection on the 3 phase connector, and the boyer regulator rectifier which worked well for about 3 weeks, then stopped working under load. Since I put the original rusty regulator back on it works fine. Good luck.

AshimotoK0:
Check that there is no resistance (infinite) between any of the three  yellow stator leads and the metal frame. I had two 400/4 stators develop this fault. The alternator runs 'dry' and not in oil as on the CB750 and the enamel insulation breaks down on the winding wires.

Just a thought.

Cheers

AshD

Bryanj:
500/550 only charge at over 3,000 rpm and then only just with a standard headlamp and not quite with a halogen replacement so it could just be if you aint riding it hard enough and doing lost of starts that is the way it is BUT do check for a good, clean connection at all terminals ESPECIALY the earth to motor from the battery

florence:
I disconnected the electric starter and just use the kick, now my battery is fine and lasts well.

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