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Old 04-06-2013, 03:22 PM   #6
Don't mean sheeit. .
slackmeyer's Avatar
Joined: Jul 2007
Location: Berzerkeley, CA
Oddometer: 3,167
I would add, it could be your voltage regulator killing your batteries- it sounds like your new battery worked the first day, then died the next. I'd leave that battery in there, jump the bike with a car battery or another moto battery, and check charging voltage both at idle and up to 5k rpm. It shouldn't go above about 14.6v, any higher will kill a battery. And voltage regs on these bikes do die fairly frequently.

old bmw
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