SOHC.co.uk Forums > CB350/400

Charging

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Bryanj:
Trigger that goes against all practice and theories, but then you did say EMPTIED and refiled which is way better than just top up

hondatri:
Hi Guys Like the Banter.Seriously I am going to go through the wiring and replace the Battery and Fingers crossed All will be ok. I wont get near it until next week so I will keep posted. Thanks to all.

hondatri:
Did not get near bike due to other problems but I have a more serious problem Put ammeter in line with Pos lead to battery again  and when I turned on the Ign the ammeter wett to full discharge (Fully left) came back to show a charge when engine started  then lights on went a little to left. I will have to go over all systems or if any other suggestions I would appreciate.

Lobo:
Hi again Hondatri.

You really need a multi meter with a 10A scale for this...  most meters we guys tend to use don't go up this high.

And before you waste any time on the below, heed Bryan's basic advice of ensuring ALL electrical connections clean & sound... this to include all the various EARTHs.
And if your battery's health is in doubt... replace it.

We need a little more info here..specifically the Ampere scale you selected in the above post. Ie, if the needle went full left (discharge) at a 1A scale... well fine, but at a 10A scale... er, problems.

With the ignition coils de-energised, ie the kill switch OFF, the only load @ ignition ON ought to be the generator field at around 1.6A. Significantly more than this (assuming all lights off etc) should be cause for investigation.

Suggest: Connect your meter in series with the battery, and via the kick start, start the engine. (If you use the elect start you'll pass 120A through your meter & frazzle it ie DON'T use the elect start)

Give the bike a few mins to electrically settle down... (lights OFF)

Then check the ammeter...  iaw the 'charging characteristics' table in the first document I posted above, ie lights On & Off @ the various RPM ranges. Make a note... and report back to the forum, somebody may recognise the symptom and give you the benefit of their experience.

If a significant discharge is apparent, try pulling / replacing the bikes fuses one by one. and if a significant (+ve) change suddenly  takes place... well you've found the problem circuit.

If no luck with any of the above suggest you stop bench test each component of the bike's charging circuit ie test each component in isolation / iaw the manual,
ie generator windings, rectifier check, regulator check. The specs can be found in the bike's manual... if needed I'll post the pages.

Simon

hondatri:
Thanks for Post. The ammeter I am using is a Millar Motorcycle Ammeter Charge/Discharge 8 amps. It is deflecting to full discharge.I will get to bike tomorrow and hope I will find the Problem.

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