Thanks to all who replied about my speedometer inquiries. Following
some of the advice I received, I took apart my speedo and did my own
odometer "refurbish" last night using some spare parts from a broken
speedo I had lying around. I hope that it holds this time. The axle
for the main odometer had worked itself loose despite multiple
attempts to realign it. This time I used a little Loctite inside the
gear, so we'll see if it holds. I also reset the odometer to 0, since
it all had to come apart anyway.  Drove it around a bit to make sure I
had the speedo calibrated correctly (+/- 1 mph according to the GPS).
If this repair doesn't work, I've got a few leads for other options.

FWIW, it's cool to see my van "without" any miles on it.

-Jarrett
'89 Westy