Ok so I sent Speedometer out for repair they got it on a Friday Augest 28 and was repaired on Tuesday the Sept. 1st. Got it on Sept. 5th.
While I waited on it I did some/lot of  research about the bouncy Tachometer. Since most of our bikes are older and they recieve a dirty or unstable electrical signal form the ignition coil.
So I started with the black ground wire at the coil that goes to the Tach and cut and spliced in with solder and shrink wrap one 10k Ohm resister in that. IF the bounce is reduced we will see, if not then I'll be replacing that 10k ohm with a 47k ohm resitsor.
Then I pulled the ICU module off and cleaned the contacts, while that was off I separated it from its mounting bracket and cleaned with alcohol wipes and reapplied new Heat Sink to it and reinstalled everything.
Then I replaced the OEM (I think) plug wires and caps with new 5k Ohm resistor plug caps. Coil was black and no cracks.
Relocated the Battery Negative cable with a 21 inch 4 Gauge from Battery cables usa one end with a 6m lug and the other end 12m lug and ran it to the right side motor mount /header hanger bolt. Nice and neat with a solid ground.
While I was there removing the negative cable from the transmission breather bolt I replaced the Speedometer cable and put in another washer onto the breather to act as a battery cable lug. I took it on a 4 mile trip and things looked good. Tomorrow I ride to work and see how everythig does.
Ride safe!

Not as dangerous, but thousands of them. White fly I think. I've been in the depths of darkest Lincolnshire. Wainfleet all Saints. Sea monsters and pirate treasure if you go any further. Oh, and a huge windfarm and a funny fat bloke with wellies as the local mascot in Skegness.
 

Well, now I got around to mount the dash, only the OIL warning is not working now. It's not coming on with the key in running position.

To answer your question, the actual indicator lights were the issue.
Oil, turn, and generator.

Hi all,

Just working merrily on putting my R65 back in the road, and today's subject is: dashboard connections.
I'll leave my findings here, in case someone will need this further down the line.

The main issue, lights not working in the dash.
Type: The 1991 R65 is part of the 1985 - 1993 line of BMW motorcycles. My dash loos like this:


Lights, from top to bottom: Turn Signal (3w), Oil (1,2W - 2W), Gen (3w), Neutral (1,2W - 2W) and High Beam - Fernlicht (1,2W - 2W)

Here is the schematics, viewed from the back of the instrument panel, not numbered, as I don't want to wrongfully inform anyone...
Will add more info as needed...

The bottom line, after a lot of scrubbing with emery cloth (or fine sandpaper) and cleaning the contacts, plus changing a couple of bulbs, it works! (on the work bench )
 

The ground being level is a must. I have a sloped drive with a bit of a hump near the garage door. No way I can deploy it there. I find pulling the nose up and applying the brake, then a bit of a bounce and haul on the handle helps.

My stand has little wear on it and doesn't go way over centre. Getting it on the centre stand is not 'effortless', not even 'easy' though. I do have a heavy RT fairing. Getting it off the stand is easy though.