Topica Loopframe_Guzzi Archive


Subject: RE: Bad Piston?

Author: oger wells

Date: Apr 7, 2005, 4:26 PM

Post ID: 1718666811



38k sounds good to me give i ride about 2k miles on a good year. I think
i will save the money and go with the cylinders for now and use that
money to get the valves cleaned up. I am having a hard time getting all
the carbon off the head and now that i look closer at the valves they
could use a little grinding on the edges.
dave luby wrote:
 
I had an Ambo eng with a stuck cyl,took a lot of pounding to break it
loose,even put a dimple in the crown doing this.After carefully cleaning
the
grooves for the rings and checking the overall specs found it to be
usable.Had the cyls sleeved and old pistons fitted and new rings
installed.the only downside they took a long time to break in.I have
about
38,000 on it with no problems.This was done before the Nikasil kits were

available.Can't say on the condition of the chrome in your cyl.....maybe
a
used cyl if the price is right? Dave

 From: joe jump <jum-@hotmail.com>
Reply-To: Loopfram-@topica.com
To: Loopfram-@topica.com
Subject: RE: Bad Piston?
Date: Thu, 7 Apr 2005 15:55:35 +0000

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oger,
Take the time to do some measurements. All the specs are in
the manual, downloadable at Greg Bender's site. Measure piston to
cylinder clearance. Measure the ring groove & clearance between the ring
& groove with ring installed on the piston. Measure the valve to guide
clearance (most probably the source of the carbon).

I don't think you want to hone hard chrome. You might be able
to source a ring set from Hastings. Use cast iron rings - don't put
chrome on chrome.


Joe in St Louis
850T-Powered Ambo

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