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I've had my battery become too weak to start or restart my bike three times in the last month or so. I took the battery to a shop to have it tested and was told it is OK. it's 2 years old, I've kept it generally on a tender in the winter, but have not been fanatic about that. This morning I started the bike up, rode it 20 minutes, parked it for an errand, got back on started it up, and rode 15 minutes to home, mostly on the highway at 50-60mph. When I got back to my driveway I turned the bike off and tried to re-start it. It did not fire and the battery died. Used my car to jump it and got it going. Turned it off after disconnecting the cables, and it had no juice and would not start (not surprising). Jumped it again and rode it into the garage.
The battery charges on the charger, and I get 12.5-12.8 volts on my multimeter with the ignition turned off. With the bike running, I get a pretty constant 14.25 volts regardless of the engine speed. These readings are taken at the battery.
Seems like the charging system is working, and the battery is not. Am I right? Need a new battery? Or is this a charging system issue, maybe combined with a starter issue?
Thanks!