Join Date: Sep 2008
Location: Honolulu, HI, USA
Old thread, but my '85 K100RS would occasionally quit at inopportune moments, such as entering the freeway. It drove me nuts until I accidentally discovered that although the main ground wire from battery negative to trans case LOOKED good, there was sufficient corrosion between the wire strands and the crimped connector at the trans side, that it went discontinuous occasionally. Replaced the wire and alles gut!
It's a known problem on K100 bikes, although they are getting a bit scarce, so the knowledge is dying out.