I had the same problem with my 1100 shadow. I charged the battery and it would go maybe 100 miles before it would go dead. I installed a new battery, thinking that was the problem. It still went dead. I then installed a new voltage regulator and checked the stator coil. Stator coil did not demonstrate anything being wrong. The bike would still not show a charge above 12.6 volts. Come to find out the normal charge voltage is suppose to run between 13.2 and 14+ voltage. I still couldn't get it to stayed charged. I finally replaced the stator and I started seeing a charge at 13.6+ voltage. Problem solved with $$$$.
Charge and load test the battery. If the battery sat dead for as little as two weeks , it could be sulfated and no good. If it is a Yuasa battery it only has a 6 month warranty , grab your receipt and race back to the dealer. They will charge and load test it three times . If it does not pass the load test you will get a new battery if it is still under warranty. Grab your voltmeter and unplug the plug with three yellow wires that is coming out of your stator. The three yellow wires coming from the stator should have continuity with each other and no continuity between any of the yellow wires and ground. That is the test for the stator. If the stator is good , the battery is good , then you probably have a bad regulator/rectifier. I suspect you just have a bad battery.
Have the battery load tested.
Connect a 0-15 volt DC voltmeter to the battery. Positive lead to the positive terminal and the negative lead to ground. The engine should be warm not hot ( the radiator fan should not be running. Turn the head light dimmer switch to high. Start the motor and rev the motor to 5000 RPM. The voltage should read 14.5 volts. If the voltage is considerably low or way high , you need a voltage regulator/rectifier.
get a bench test done on battery is the fastest solution
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Ok, thanks for the help. I checked the stator there was continuity between all three connections and no continuity between the connections and ground. Is there a test for the regulator?? I just have a feeling that the battery is not bad.
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