Topica Loopframe_Guzzi Archive


Subject: Re: Chrome bore help needed. I think (hope) mine is good

Author: Ian Adkins

Date: Feb 4, 2001, 10:15 AM

Post ID: 1705268597


Rich,

I would think that as long as the bores are good they will stay that way.

Being from the "rusty" north I think that what causes the bores to flake is
that a very small hole, crack, or whatever allows moisture to get behind the
chrome and oxidation spreads behind the chrome. The pistons remove anything
that starts to come away from the walls and the process continues till the
chrome is gone. I see it on the chrome and painted surfaces on cars here
that are attacked by rust from the road salt.

If you are riding regularly, keep the oil changed I don't see why you can't
run on those cylinders for another 100,000 miles. I know a guy up here that
has over 100,000 miles on his Eldo and he parks it in the winters.

Also....I think that some cylinders were likely a little better than others.
Maybe you got one of the "Wednesday" cylinders :-)

Now if your clutch plates are original...I would be concerned.

Regards...Ian


-----Original Message-----
From: richard zink <rzink-@aol.com>
To: Loopfram-@topica.com <Loopfram-@topica.com>
Date: February 4, 2001 3:37 AM
Subject: Chrome bore help needed. I think (hope) mine is good


Loopers, Took the Ambo out for a nice 50 mile loop today. Cooked dinner
 for my wife and daughter and since I was such a good cook :-)
I got to go to the garage for a couple of hours. So I pulled both the
intake
 and exhaust manifolds, the oil line, rockers, head bolts, and pulled the
heads and cylinders off the left side. So I find no wear on the rockers or
pins, the heads have minimum carbon buildup, the pistons are only a little
crusty on top (already scraped clean) and the cylinders look as nice as the
Nikasil ones on my Cagiva. This is to say I can see no flaking, pitting or
feel any ridges from wear. Sure the bore where the rings don't make contact
are a bit duller than the rest but my fingernail can detect no ridge. And
all
 of the O-rings fell apart as soon as I touched them (already covered as I
acquired all of the gaskets and such before starting). This is on a '71
Ambo
 with 46K, that the second owner (who owned it 17 years) reported only
having
 the pushrods replaced due to one breaking, on the top end. So someone in
the
 know of the vastly reported problem with the chrome bore flaking and/or
wearing out please enlighten me or give me the signs I should be looking
for.
 How many miles do ones with good care and don't sit a long time go? She
does
 not smoke except for when the choke is on and compression test runs about
160
 psi with my 20 year old gauge. I feel like a happy camper but don't want to
get too optimistic. Now if I only felt this good about the clutch but will
report on that when I get the time to pull the tranny.
Any first hand knowledge, reports, wisdom, BS or encouragement will be
appreciated.
Rich

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