Incorrect jet centering will indeed cause a sticking piston, there should be
no contact between piston and dashpot cover. You will need to be sure the
jet is centred before you will be able to tell if you have piston/cover
problems.
PaulH.
----- Original Message -----
From: Phillips, Frank <fwp@ufl.edu>
To: <mgs@autox.team.net>
Sent: Monday, August 07, 2000 1:35 PM
Subject: More SU problems
> Now the current problem! My rear piston is sticking. When I use the
lifting
> pin or a small screwdriver to raise the piston (as in tuning the carbs)
the
> piston has an initial point of resistance that must be overcome to rise.
> According to Haynes I should use metal polish to clean the area causing
the
> sticking. I have two questions:
>
> 1) How do I determine the spot that is causing the problem or should I
> simply make the whole piston and chamber insides shine?
>
> 2) As I rebuilt the carbs I had to center the jets, could poor centering
> cause the problem? In other words, is it possible that the piston is
sitting
> at an angle and thus does not rise correctly in relation to the chamber?
> Could this be tested by fitting the piston without the needle and lifting
it
> or would the absence of the needle cause the same condition?
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