Hi all, I really hope all the experience on this forum can help me. My brick will not turn over. This post may be a bit long, I'll detail exactly what my bike is doing/not doing, and what I have done so far to try to fix it.
When I turn the key two clicks to the right (all the way clockwise) on my 1985 K100RS (production month 07/1984), with 94,952 on the odometer and 12.6 volt battery and push the start button (with kill switch at 12 o'clock).......nothing. What does happen is:
-The tachometer goes to ~5000 RPM and stays for 3-4 seconds, then drops down.
-The green neutral light and the one above it (red triangle), and the oil light, come on
-Initially no headlight, but about the time the tach is dropping, the headlight comes on VERY weakly.
-No horn or turn signals.
-When I flip the kill switch to 10 or 2 o'clock it shuts down all the lights.
I have searched through all the sections here and printed out a fair amount of stuff. So far, I have tried:
-Rolling backward in gear and popping the clutch 3-4 times.
-Removing the starter, opening it to clean it out (P.O. had tried this so it was clean). I put 12 volts to it while I had it off the bike and it spun freely. I cleaned the mounting feet and frame (even though I understand it doesn't ground through the feet) as well as the cable connection.
-Removed the tank, separated every connector I could get to, sprayed with de-ox and mated/unmated several times, then sprayed with contact cleaner.
-Cleaned up both grounds that I know of; the wire from the battery and the one under the tank (labeled #9 in one diagram I found).
-Cleaned with de-ox, etc. the large connector in the compartment on top of the battery.
-Checked the voltage on the clutch handle circuit (a thread I found), and it was ~5 volts whether the handle was pulled in or not' I'm thinking maybe a PO had wired around this switch.
-Removed the ignition switch, took it apart to clean it, and put it back. The contacts were actually pretty clean.
There was a one-time event that was strange. When I first had the tank off and had cleaned and sprayed the 4-pin connector under the tank, I tried to start it. There was a very high-pitched whine that came from the relay box, when I touched the LSR I could feel it vibrating. I turned off the key and could never get this to repeat.
The PO used this bike as a daily driver (we work together, it's how I came to admire the bike). He said one day it just quit turning over. He knew a little about things, so he removed the starter, opened it and cleaned it, and put it back. No go. The only other thing he said he did was replace the hand controls with ones he bought on e-bay.
I apologize for the length of this post, but I'm hoping to answer most of the obvious questions and to show I've tried to do my homework here by searching.
Please help guys !!! Thanks
Bob
