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28-06-11, 06:06 PM

OK, with a good battery:

Off 12.78V
Ignition + lights 10.9V
Idle + lights 18.8V
5000 rpm * + lights 8V

Stopped testing at this point as don't want to knacker this battery too. Is it safe to disconnect the reg/rec, then start the bike and test the alternator output?

* guessed at 5000 rpm as tach needle still stuck

28-06-11, 06:06 PM	#12
Terah Guest Posts: n/a	Re: Faulty reg/rec, battery, or both? OK, with a good battery: Off 12.78V Ignition + lights 10.9V Idle + lights 18.8V 5000 rpm * + lights 8V Stopped testing at this point as don't want to knacker this battery too. Is it safe to disconnect the reg/rec, then start the bike and test the alternator output? * guessed at 5000 rpm as tach needle still stuck