Topica Loopframe_Guzzi Archive


Subject: Re: Generator Woes/Alternator conversion? (Long)

Author: Zerhackermann .

Date: Dec 21, 2001, 11:35 AM

Post ID: 1709211669


Just so you have all the info...

if the gen is mounted on the block, when the block shift in the frame under
acceleration, the gen will move with it. having it remote on the frame will
pull on the belt. not a whole lot. but some.

seems to me the best thing to do is to repair the original mounting spot.
helicoil, welding, etc.


 From: Allan <mut-@msn.com>
Reply-To: Loopfram-@topica.com
To: Loopfram-@topica.com
Subject: Re: Generator Woes/Alternator conversion? (Long)
Date: Fri, 21 Dec 2001 02:43:01 -0500

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Thanks for the info. I think I will call in a marker from a machinist
friend and see if we can fabricate a bracket that will hang from the frame
yet leave the gen in the stock position. If anything you have givin me some
ideas to work with. The quick and dirty flip the bracket over would
certainly get me on the road tomorow, it is tempting but something nice
looking would be better. I don't mind if the bike is stock but it cannot
look bad or thrown together if I can help it. The alternator idea is good
as they are usually lighter
and would not tend to tear their brackets off from vibration. I sure miss
my old Amb.

Allan

72 Eld with 1066cc kit which is why the block is staying however the gen is
mounted.
----- Original Message -----
From: Charlie Mullendore
To: Loopfram-@topica.com
Sent: Thursday, December 20, 2001 6:28 PM
Subject: Re: Generator Woes/Alternator conversion? (Long)


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Hi Allan,
There is the possibility of mounting an alternator instead of the
generator. There was a "950" Eldo at the WNY Rally that had been converted
to an alternator using one from a Geo Metro. The owner, Dale Peterson,
fabricated an aluminum plate that bolted to the front of the timing cover
(just behind where the generator belt runs) and used the top two timing
cover bolts to hold it in place. The Geo alternator had its mounting "ears"
cut off and the bracket was bolted to the front of it (I think he used the
alternator "through bolts" somehow). There was a small "L" shaped bracket
at the back of the alternator to help support it also. The Geo pulley was
left on the alternator and the crank pulley was stock Eldo. The generator
belt cover was unaltered. The whole conversion was so nicely done that he
had to take the generator belt cover off for us to see how it was mounted.
I believe Gary Cheek is working a conversion using the same alternator -
maybe he could help?

While I'm on the subject of Dale's bike, I'd like to share a few other
things he did that I found interesting. He used studs with s.s. acorn nuts
a number of places on the bike where frequent disassembly might destroy the
threads eventually using bolts. For instance, on the carbs. where the fuel
inlet "banjo" attaches and on the gen. belt cover. He also used studs to
attach the timing cover and the oil sump. He drilled small holes (approx.
1/16") in the top of the carbs above the slides. He would measure the
height with a piece if wire he carried in his toolkit and when he was done
there were small pegs to plug the holes. Relays for the horns and lights
along with the circuit breakers were mounted inside the right-side toolbox.
There's probably a few more details I've forgotten to mention. I've got
pictures of this very nice red/white/green creation and will post them as
soon as I get time. Cheers,

Charlie

----- Original Message -----
From: Allan
To: Loopfram-@topica.com
Sent: Thursday, December 20, 2001 2:42 AM
Subject: Re: Generator Woes


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Hi
I did the shim for the front of the generator already. The
mounting pads with the two bolt holes had been machined away and the space
filled with aluminum barstock which was welded into position, the barstock
has come loose frome the welds. there is nothing holding the gen. bracket
to the engine anymore. I don't see a way to repair this that will last.
that was why I was looking for an alternative for mounting the generator.
----- Original Message -----
From: Patrick Hayes
To: Loopfram-@topica.com
Sent: Wednesday, December 19, 2001 7:20 PM
Subject: Re: Generator Woes


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In a message dated 12/19/2001 2:41:54 PM Pacific Standard Time,
mut-@msn.com writes:



I just can't
face having the engine down again to reweld this with the chance
of
distorting the lifter bores.


So don't. I ran my 73 Eldorado for over 100,000 miles with a worn
down generator support yoke casting. Without the support at the front end
of the generator, vibration will quickly tear the generator bracket to
pieces.

Just mount the generator gently and measure or otherwise determine
the amount of slop between the generator and the casting. Now get a
comparable piece of brass of the same or slightly larger thickness and cut
a shim to fit in there. Some snipping and tapping will get it to fit into
its curve. If done well, you can have tabs to bend over and hold it in
place. The shim will securely take up the loose space and work for maybe
50,000 miles. What more do you want? Let me know if you want a picture
and I'll try to draw one.

The big issue is on reinstalling the generator and belt. If you
make the belt too tight, it will crush the brass shim quickly, allowing the
generator to rock and again break the mounting bracket or one of its
mounting bolts. If you make the belt too loose, it will flop and vibrate
and set up some motions which might accelerate crushing of the shim. The
loopframe belt should be just tight enough to not flop around and certainly
NOT taut. It should be nothing like a power steering or air conditioner
belt. Just snug.


Patrick Hayes
Fremont CA
EV, EV, SPII, V-65-C, Monza, SuperAlce
MGNOC L-403
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