I've posted to the Forum before on this but am still stymied trying to resolve the issue. When running, the bike discharges the battery fairly rapidly with the lights on - within a 20-30km ride I end up with a dim (or no) headlight, no horn, no tail light or brake light. The ammeter needle fluctuates a lot, mostly to negative. Once home within an hour the battery has recovered and everything is back to normal albeit with somewhat less than optimum voltage of course.
The dynamo has been removed, examined and checked out professionally. All is good.
It has a new 14amp/hr battery (the specs call for at least a 12amp/hr)
It has a new electronic voltage regulator from Draganfly (note the charging issue was occurring with the old voltage regulator)
I connected a multimeter between the charging system and the battery which was slightly discharged (5.9V) so I could see whether the dynamo would charge up the battery. I started the bike and immediately the multimeter was flashing random numbers. No way I could get a reading of any sort. My plan had been to study the voltage at idle, with increased revs and then when the lights were switched on.
Any advice from anyone who has had a problem like this would be much appreciated. Thanks.