I am having a problem with my motorbike's new battery and trying to prove if the fault is the battery or something else like the regulator/rectifier.
We went away on a camping holiday at the weekend on the motorbike. I had problems the previous week starting the bike, so seeing as the battery was about 8 years old and was dropping to 7.5V when cranking and struggling to start, I decided to replace it.
I bought a Yuasa brand battery and the battery had been activated with the acid packs only 3 weeks before I bought it.
I gave it an initial charge with my Optimate 3 charger overnight and it was charged by the morning.
I rode the bike to work for 4 days and charged the battery overnight again the night before I left. Rode over 350 miles on holiday with no problems.
On the way home I rode about 120 miles then stopped for fuel. Got back on the bike and could not start it. It did not even turn over once and the voltage dropped so low the dashboard and digital display powered off.
I left it a couple mins then tried again, same thing. I tried turning the engine over by pushing the bike forward in 4th gear but it was fine.
I called the breakdown and luckily he was nearby. He jump-started the bike with his battery and it started instantly. He told me he sees this a lot and it is a faulty battery (which I was hesitant to believe).
I left it idling for 10 mins while I re-assembled the seats then rode 70 miles home with no trouble, this was yesterday.
I just got the bike out after work this evening to measure the battery with my meter connected to the battery in min/max record mode.
It was initially at 12.8V. Then at 12.5 when the ignition was switched on and then dropped to a min of 10.3V while cranking.
Once started the voltage is now 13.5VDC.
I measured the AC voltage and there is 0.03V of ripple.
As far as I can tell this looks normal.
Any thoughts?
Does this prove the regulator/rectifier is working alright?