Originally posted by deilenberger
Using a pencil eraser would be difficult to do on a K bike instrument pod - the contacts are square pins going into square receivers. The usual way to enhance the conductivity of these is twofold:
1. Give a very slight twist to the square pin - it exposes new sharp edges to the square receiver.
2. Use a bit of antiseize that contains metal (look for the silver colored stuff) - it helps seal out air and moisture while not reducing conductivity (which di-electric grease WILL do).
I'd also suggest adding 1/8" foam on the back of the two plastic arms that hold the contacts going to the speedo and tach (they'll be obvious when you open it) - so the case presses these arms into better contact with the boards below them. BMW did this modification on later model K pods.
Dunno where you get your electrical tape - but I used it for 6 years on my '85 K100RT and have it on THE K75S - for about 2 years now. It has not failed, slid or come off. Scotch Brand is about the best quality.
On most of the K bikes - the area that the tape is put in (over the large sponge rubber O ring sealing the case halves together) isn't visible with the pod mounted to the bike.
Black silicone (silicon is a crystal used in semiconductors) might be a very BAD thing to use for this application unless you use a specific ELECTRONIC GRADE.
The normal stuff gives off acidic fumes - that smell like vinegar - that WILL attack the contacts inside the case and may attack the circuit traces on the flexible circuit boards inside the case. Not a good idea at all.
Ummm.... what rubber grommets?
The K instrument pod has square pins that protrude through holes in the case. Not a grommet to be seen. There is a rubber seal of sorts on the cover that goes over the connectors - but I've never seen this fail, and it's effect on waterproofing the pod is questionable at best.
Again - I'd suggest looking at the K-tech-FAQ's on http://www.ibmwr.org
- lots of experience there with K instrument pods and lots of good advice.