speedo/odometer repair

 Anybody ever attempted a speedo/odometer repair ?

The trip odometer on my bike is crapped out. The local
speedo shop is pricey to the point where it might be
cheaper to buy a new one for ~ $500.

I had the unit apart and back together but failed to fix
the problem. I think it's the gear on the lifetime odometer
which drives a gear on the trip odometer spinning on it's
shaft when it's not supposed to. Other possibility might be
a malfunction in the trip odo reset mechanism.

I'd really love to find some reference diagrams or hear
other people's insights. Bike is an 88 BMW R100GS.

I figure if all else fails, I'll ship it off to Sean to graft it
together with some '70s vintage Honda components
and make it work that way. For the moment, I've got
a Sigma bike computer that provides pretty good
speed and odometer readings.

Thanks in advance for the as always helpful reeky advice.
Can't wait to see whether this morphs into a thread on
immigration, global warming or health insurance.

 On 7/4/2011 11:49 AM, Rob Kleinschmidt wrote:

I can't help you directly but I will weigh in on why there
isn't a lot of information out there about this- it's valuable.
People who have spent the time to become familiar with fixing
'specialist' type things frequently make a good income out of
fixing them and realize that early on, and keep quiet about
their trade secrets. Or, your Googling skills aren't so great.

:)

I don't know what the ultimate fix is going to be but if it
was me doing it, I would have the guts spinning while I
watched with an extreme close-up fiber optic inspection
camera, and if it was a loose gear I can guarantee J-B Weld
would be involved in the fix.

 Mark Olson wrote:

I've had many an Airhead and K style unit apart for repairs and demisting
when I worked for a main dealer. Your GS is a little different and I've not
been inside one. The other two are somewhat modular and can be repaired with
used parts.

If you are a good instrument mechanic with some decent tools and a digital
camera you could perhaps strip and reassemble them.

Failing that I might look here for alternatives.
http://www.acewell.co.uk/


--
Hog

 

Which I'm about to use to fix a pepper mill that refuseth to mill any
more.


--
BMW K1100LT  Ducati 750SS  Triumph Street Triple  Honda CB400F
Suzuki TS250  Suzuki GN250  chateaudotmurrayatidnetdotcom
Nothing damages a machine more than an ignoramus with a manual, a
can-do attitude and a set of cheap tools

 On 7/4/2011 2:09 PM, The Older Gentleman wrote:

It fixes nearly anything but a broken heart and I'm not 100% sure it
won't fix that, too.