Subject: Re: Forks
Author: Rich Marchand
Date: Mar 29, 2003, 4:20 AM
Post ID: 1712427710
Just catching up on my e-mail and thought I'd throw my 2 cents in. Been
running 40 WT motor oil in my 74 Eldo drum brake .To be honest I can't tell
any difference between 40wt and ATF.
Here's an e-mail on the subject from a while back ..hope this helps
Rich Marchand
1980 BMW R100RT
1974 Moto Guzzi Eldorado
MGNOC# 17418
ABC # 6037
'Those are my principles. If you don't like them I have others"
Groucho Marx
----- Original Message -----
From: Greg Field <gfi-@halcyon.com>
To: <MotoG-@topica.com>
Sent: Friday, February 25, 2000 10:57 AM
Subject: (Guzzi) Use Motor Oil in Ambo Forks
|
I'm getting a lot of mail on this, so here's the answer for you all: I use ATF because my Eldo has the disc-brake forks with sealed |
| cartriges (like your Convert does). All it does is lube the sliding |
When Maude (the Eldo) still has its drum front end, I used the |
| generic straight-viscosity 50-weight motor oil I could find. That |
| meant generic oil for Harleys, since almost no other group has used straight 50-weight for decades. Remember, that fork is on a technological level with the Harley |
| fork of 1949 (and it's no accident that it bears a resemblance, |
| There are no small damping orifices in it, just a crude forcing |
| the oil really does is lube the parts, provide some "damping" |
| viscuous drag, and retard bottoming action as the tube end nears the forcing cone on the slider. The result is that you don't need fork |
| with all their special anti-foaming agents. Motor oil works fine and |
| cheaper. The best you can do to improve the Ambo fork (short of machining up |
| of real damper rods for it or replacing it with the later fork) is |
| in the heaviest oil you can find. In Seattle, 50-weight works pretty |
| but if I lived in Phoenix, I'd try 140-weight tranny lube (which is |
| equivalent to 70-weight motor oil). Hope that clarifies what I originally said. GF |
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