How do you check a regulator and alternator fo proper out voltage voltage output is less than 12 volts. need to know how to tell if alternator or regulator is bad

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Hi Tom, if you plan on doing as much on your bike as you can without going to a repair shop then you are going to need tools. The first and very best tool you will ever buy should be a service manual. It will pay for it's self the very first time you use it to diagnois your charging system issues. Good luck
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