Join Date: Jun 2015
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The voltmeter could be off as well, quality on the tools is certainly going down unless you're talking a Fluke or other high end unit. The checks are battery with engine off, then voltage at batt at 3k - 5krpm. If you're seeing a 1.7 to 2v difference, you're in the range of being good. That's a ballpark, highbeams, electric clothing, aux lights, etc can lower that a bit.
It's best for the battery to let it sit on the tender when not in use.
Current stable: '72 GT750, '74 GT750x2, '75 GT750, '82 MB-5, '85 CMX250CD, '12 CBR250R, '14 Spyder RT-S