http://www.oregonmotorcycleparts.com/FAQ.htmlScroll down a bit, and you will find assistance on how to troubleshoot these devices. He even suggests using an inexpensive DVM, commonly available from DIY stores, $10-$20, but they can be had for as little as $4-$7, if you shop carefully, watching sales brochures. Cheers!
1979 CB750K (sold, 2012, but not forgotten)
1983 Kawasaki 440 LTD Belt Drive (sold, 2011)
1993 Kawasaki Voyager XII