Join Date: Sep 2008
Location: Honolulu, HI, USA
Trevor (as a two-time former K100RS owner over 12 years):
You need to get, read, understand the K100 electrical diagram. As diagrams go, it's not that difficult, and if you're going into electrical matters, it's essential. You DON'T want to hack at the electrical system, this will very likely get worse rather than better.
Electrical diagnosis (IMNSHO) requires first, knowledge of the circuit you suspect, second a testing methodology that provides applicable information, third, implementation of the test results. Overall, rational testing is most important.
I don't have the diagram handy any more since I sold my bikes 3 years ago, but a quick search should turn them up.
Last edited by Honolulu; Jul 18th, 2019 at 4:09 pm.