SOHC.co.uk Forums > CB350/400

battery drain

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Lobo:
If you haven’t got a multimeter...
(As you noted... the ‘400 fuse holder can indeed be the problem...)
On a dead bike, ie ignition off, lights off etc, when you disconnect / reconnect the battery you shouldn’t get any spark - small or otherwise. If you do get any kind of spark... there is indeed a small short / earth leak somewhere.
So... assuming there is a wee spark at battery connect..
Keep the bike ‘dead’.
Then pull all 3 fuses, and replace singly, reconnecting the battery to check for tiny spark ... to narrow down which fused circuit is the culprit. Assuming you can narrow it to one circuit, then, using a circuit diagram disconnect items singly... eg coils, starter solenoid, horn, left indicator blah blah ... and so on until that wee spark returns at battery connect.
Then check / clean the offending wiring / connections / earth etc.
Good luck!

SteveW:
Motobatt batteries are a pain in the arse. I have had a couple replaced under warranty on my Fireblade.

If they go flat they never seem to fully recover afterwards.

The only way to use one successfully is to have one connected to a trickle charger when not in use.

flatfour:
Different story with Motobatt for me, used them extensively over the past five years or so on a variety of bikes and found them to be first class, holding a charge for long periods when unused and spinning a cold engine over reliably every time.

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