Topica Loopframe_Guzzi Archive


Subject: RE: bearing damage?

Author: Greg Bender

Date: Apr 21, 2005, 1:59 PM

Post ID: 1718741249



Hi Todd,

With the clutch engaged, you simply want to be sure that the throw-out
bearing isn't turning. The easiest way to check is to put the bike on
the centerstand, start it up with it in neutral, and look at the rear of
the transmission. If the plunger under the lever arm on the back of the
transmission is turning, then your bearing is turning, too.

At the clutch lever, there should be 1/8" (4mm) of freeplay. With that
much freeplay, the plunger shouldn't rotate. If it does, then I would
suspect some type of snag in the cable itself.

As for the noise you are hearing, I would think that the throwout
bearing would begin to "whirl" before the clutch is 2/3
dissengaged...but who knows. The good news is that it should be pretty
straight forward to check the throwout bearing (just draw it out with a
magnet from the rear of the transmision. It could be that you have one
of the early ball-type throw-out bearings that had a tendency to fail.
The needle-type are much hardier.


Todd Nordwig wrote:
 
Last week(?) someone posted about clutch cable adjustment and bearing
transmission throw out bearing damage.....I may be having the same
problem.

After a 500 mile weekend ride last fall I noticed difficulty disengaging
the
clutch far enough to get the 4 speed tranny in gear. I figured I had
some
stretch in the cable and shortened(adjusted) it
enough to get the clutch disengaged so I could easily put it in gear.
Within a day or so I started to hear a "whirling" sound every time I
pulled
the clutch in. Today I started the ambo and slowly pulled the clutch in
to
see where and when this sound would occur. About 2/3rds into the clutch

disengaging this sound of bearings(?) making contact with something
starts.
I can put the bike in gear, and it runs fine, but am I doing damage to
the
throw out bearing? Is the clutch adjustment so fine that I have to find
the
degree of adjustment that allows disengagement just before bearing
damage?
What am I doing wrong?

Todd

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Regards,

Greg Bender
1971 Ambassador
2000 Quota
http://www.thisoldtractor.com/gtbender

Florida MGNOC website
http://www.thisoldtractor.com/fl_mgnoc

Minnesota MGNOC website
http://www.thisoldtractor.com/mn_mgnoc

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