Join Date: May 2009
I Ride: B1H ZX6R 636 2004
Basically a rectifier/regulator turns ac into dc. The altinator supplies ac across a number of diodes to limit the flow in one direction and turns it to positive dc which is then smoothed by a capacitor. If you have a tester you should be able to follow the Kawasaki manual and be able to check it. If you havent got an avo - multimeter (digital or otherwise) it might be a time to invest, it might save you the cost of a battery!
There are three types of alternator failures: short, open (wire burned out), or loss in motor magnetism. A short or open in one of the coil wires will result in either a low output, or no output at all. A loss in rotor magnetism, which may be caused by dropping or hitting the alternator, by leaving it near an electromagnetic field, or just by aging, will result in low output. Refer to your manual, but it should say something like this.....
• To check the alternator output voltage you will have to disconnect the alternator leads and check them across the connectors. Noting the voltage readings (total 3 measurements).
NOTE You will have to observe all of the saftey precautions that are specified in the manual!
Hope that helps, one of my best buys was a multimeter.