Honda Shadow Charging System?

fizz

New Member
After finding one morning a flat battery I have performed some checks on the system - is the following normal.

I am recording on average 13.7v across the battery terminals with the bike running - is this a sign that the alternator is good/ bad.

After battery was re-charged I recorded 13.1v which overnight has droped to 12.7v - Is the battery good/bad.

The bike is used 3 or 4 times per week and the battery and alternator were changed about a year ago.

Any thoughts?
 
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