Subject: Guzziology on Rear Drive Oil Migration
Author: Keith Ruff
Date: May 31, 2005, 8:25 PM
Post ID: 1718953272
Was just reading Guzziology and stumbled upon something interesting
about oil migration. Book reads as follows:
"I have 2 clues as to the cause of the problem. One involves the
carrier for the pinion bearings, which on all but the earliest big twins
has little flat spots on the circumference that are supposed to align
with the slots in the rear-drive casting. If you look for them they are
quite apparent. Their purpose is to route lubricant forward to the
pinion bearings then back to the rear drive....
I have once been handed just the rear drive from a bike that was
experiencing fluid migration just since that rear drive had been
installed by the customer. I found that the pinion carrier was
installed incorrectly-the little slots weren't in alignment. After that
problem was rectified the bike suffered no further problems with
lubricant migration."
Now, I'm not sure what all of this stuff is as I have never been inside
the swing arm/rear drive, but I wonder if that is what the problem is
with my Ambo? The previous owner removed all of the rear drive sidecar
gearing and re-installed the original gears. Perhaps he did not align
these slots on the pinion carrier?
Keith Ruff
70 Cafe Racer Ambo
Manahawkin, NJ