It aint rocket science
Join Date: Nov 2010
Location: Glastonbury, Connecticut, USA
Model: The best
A few things are needed to test charging- starting system. Volt meter, amp meter and load tester for the battery. Most will not have the amp meter or load tester, so we must rely on volt readings only to narrow it down some.
After charging, a battery will have a static or surface charge which must be removed for a battery voltage test. This can be done by turning the key on with the draw from the headlight for one to two minutes. Let the battery recover for a few minutes and take voltage reading, should not be below 12.5V or so. With bike running at fast idle charging voltage should be between 13.6-14.2V.
The starter should draw no more than 125A and this is where the amp meter is used while cranking. Without the amp meter you will have to rely on volt readings. While cranking, the volts should not drop below 9 or so. If the volts drop much lower than this the battery, starter and connections are then suspect and the above mentioned meters are required to properly diagnose.
There is NO substitute for experience
I'll be around when I come around and not before
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WS Grand Chapter CT
If local and need help with a 1500, Valkyrie or ST repair please PM