Topica Loopframe_Guzzi Archive
 

Subject: Re: my baby lives!!!!

Author: Darrell Dick

Date: Aug 9, 2002, 12:27 PM

Post ID: 1710772203

The reason they pin the rings on two-strokes is that if the ring rotates
so that the gap sweeps across the port it is a disaster. The ring end can
catch, breaking the ring, probably the piston and who knows what. I've
never seen this done on a four stroke and I've seen my share of pistons
and rings. Doesn't mean it isn't done though. I've got to pull the top
end off my Convert so pretty soon I'll be experienced on 1000cc iron
cylinder Guzzis too.

regards,

Darrell Dick
Imlay City, MI

On Fri, 9 Aug 2002 13:36:26 +0000 Fred Sahms <fr-@fredsgarage.net>
writes:
 My RD400 has little steel pins to locate the rings.

But I have never seen those, or any other ring locating method, on
any
stock or aftermarket Guzzi pistons. Hmmm..do those pistons have
MONDIAL
cast into the inside wall of the skirt?


Bill Berry wrote:
 They are very tiny bumps inside the ring grooves. Hard to
see. On my bike, the top ring has one at about 11:00 and
the lower ring has one at about 5:00. Like I noted in my
reply to GH, these are out of a G-5 or CX-100. If you
have an older, iron sleeved 949 conversion, you may likely
have these. A couple of guys told me this is how many 949
conversions were done in years back. Sleeve the stock
cylinders and use 88mm pistons from a G or CX.
Chris in NC


On Fri, 9 Aug 2002 07:44:39 -0400
Kevin Graf <kgr-@midwestpension.com> wrote:
 Yeah, I never seen as much. You got my curiosity peaked.
Granted, Ambos have
different pistons, but I never heard of pins for rings,
for anything. Don't
remember anything like that on my pals 74 either. Does
this have something
to do with sleeved cylinders? I'm I out of date, or not
up to date?
How's it set up? Where are the pins located? For all the
rings? I can't
picture it.
Please.... send..... more.... info...
Thanks,
Kev



-----Original Message-----
From: Greg Hopkins [mailto:grvd-@aol.com]
Sent: Thursday, August 08, 2002 10:57 PM
To: Loopfram-@topica.com
Subject: Re: my baby lives!!!!


Thats's weird, My '74 LAPD (eldo) doesen't have any
locating pins on the
pistons. What gives? Greg



73 Eldo in crates
78 T3/949

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