Trip odometer bites the dust

[Guest]

My GS trip odometer finally went belly up this week. When I reset it, it goes from 0.0 to 0.1, then 1.1, 22.2, 33.3 and finally settles on 44.4 and stays there. Has anyone heard of this, or have a possible fix? I would not be averse to opening up the can because it will also give me a chance to remove the accumulated bugs. I have owned many bikes that never even had a trip odometer, but it is a nice-to-have item. And the speedometer and regular odometer work fine, so it is not a cable issue. It is inside the instrument itself.
I checked on the on-line parts fiches and apparently this only fits 83 1100ED and 1100ESD models.
I have no use for an 85 mph speedometer, so please do not offer to sell me an 82.
Thanks in advance.

[DoubleBit]

Wow, this is an older post. But so far it's the only one even close to what I'm seeing my speedo do.
Last weekend I lubed the cable and just fitted it back on figuring everything would be fine.

Well, not so.
Now the speedometer is still working just fine.
The tripmeter has stopped working, doesn't go up at all, stays at zero.
And, the odometer is actually running backwards.

I've never seen such a strange thing.
Any clues?
I'm pretty sure this means my speedo is done for.
But heck, I don't have a line on one of those either.

BTW, (please don't throw rocks) this is on my '82 GN250 super commuter.

Thanks, Art