Topica Loopframe_Guzzi Archive


Subject: RE: Name That Tune (sound)

Author: Kevin Graf

Date: Mar 2, 2004, 5:32 AM

Post ID: 1716190998



Man oh man, could be just about anything. Try a compression test and/or a
leakdown test(if your lucky enough for that set up. See if that tells you
anything.
Is it consistent, rythematic? It really does not sound like the normal valve
noise, but I have to throw that in there

If its erratic, something ain't right.

Your eldo should have a timing chain instead of the gear set. I would take a
look at that. There is an adjuster in there, maybe that's shot.If you do,
you might as well replace it anyways, unless it looks like it just rolled
off the line. Of course take your best guess at the chain.

Not that big of a hassle to visually inspect the engine, maybe a broken
valve spring?

Of course if all looks good there, pull the cyl. All that metal in the oil
worries me, the cyl/pistons could be shot, of course the compression test
might show this.

From there it not that far to pull the rods and check the bearings.like
Chuck said.

Of course before all this check make sure everythings tight.
Sorry, couldn't give a answer to nail positively it down.

Good luck

Kev


-----Original Message-----
From: kcampbellNH [mailto:cshigh-@netscape.net]
Sent: Monday, March 01, 2004 10:59 PM
To: Loopfram-@topica.com
Subject: Name That Tune (sound)


Maybe this is normal for a loop motor, I have much Guzzi and automotive
experience, but only had one other loopframe, a 70 Ambo. I only kept it
about three weeks as I was riding other more exotic stuff (Laverda Jota,
750GT Duck, etc.)at the time so I traded it for a 850-T. That was a
decade or more ago. Anyway, I have a 74 Eldo w/amals. It has 29k miles
according to the original owner who said the speedo worked. He was
right, it worked, but the drive gear in the transmission had been
removed (say stolen, or "sourced") along with many other parts, so I
really do not know how many miles are on it but I think it is close.
Here is what I hear. At just over 3000 RPM a fairly loud, sharp rap,
slap, tap, you name it kicks in and drops off above 4000. It is loudest
in a neutral load (not accelarating or deaccelarating)or very slight
load. It sounds high up, towards the front and possibly louder on the
right(could be my better ear!). When I got the bike back in August It
had not seen much riding or maintenancein years and I found the oil
looking like metalic paint. By advice from this board I removed the pan,
replaced it and then changed and strained the oil twice in the next 100
miles and it looked fine. I have adjusted the valves twice to .006 int.
.008 exh. If I am doing it right that should not be the problem.
Although I have wondered why if you adjust the valves at TDC it seems
the clearance actually increases at other positions. Could it be normal
slop/wear and chatter in the timing gears? The bike runs great and does
not smoke or use oil.
Sooooooo, what do you all think?. Is it normal for one of these engines?
Thanks in advance for the advice/answers.

98 EV
97 Sporti
80 v50++
75 T-3
74 Eldo

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