Topica Loopframe_Guzzi Archive


Subject: Re: speedo crap-out

Author: Patrick Hayes

Date: Jun 18, 2001, 5:24 PM

Post ID: 1707167260


In a message dated 6/18/01 3:44:57 PM Pacific Daylight Time, gun-@lynnet.com
writes:

<< so no, i
haven't tested >>

From your description, you still haven't verified that the drive mechanism
turns. You now have the cable outer and inner detached from the
transmission. Put the bike on the centerstand and roll the rear wheel. Can
you see the drive system in the transmission turning? If you hold it with a
little needle nose, can you feel the force of it turning or does it slip?
There are several ways (rare but possible) that the system could fail down in
the transmission. Easy to see now that you have the cable off.

If the drive system is good and your cable was intact, then two possibilities
remain. The obvious one is that the instrument itself is failed. Send it to
Palo Alto Speedo. The non-obvious one is that all along you've had a cable
with too short an inner core. It was barely engaged in the back of the
instrument. For some reason, it has finally backed out so that the cable
spins but the instrument doesn't. Rare, but I've seen it.

Have you had this transmission or speedo drive disassembled previously. Do
you know the trick to installing the thrust washer at the bottom of the worm
drive shaft? Did you maybe not install that thrust washer?

Patrick

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