Had a poor > no start issue. There is a multi-pin connector on the left front of the frame from the regulator/rectifier wiring loom. It is not a sealed connector and is exposed to rain, road spray, soap, etc. Separate it and clean the terminals on both sides using a pipe cleaner soaked in contact cleaner, denatured alcohol or similar. Probe as far into the connectors as you can, then use air or canned "duster" to blow everything out and dry it. Then, probe and swab the contacts using a fresh pipe cleaner with Caig DeoxIt on it, then plug and unplug 2-3 times to ensure good contact. I had no problems since. A check of running voltage with a multimeter will let you know if all is OK. Mine was 14.02V, which is "acceptable."