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Re: rebuilding SU's

To: MonteMorris <>
Subject: Re: rebuilding SU's
From: Paul Root <>
Date: Tue, 26 Nov 2002 08:13:04 -0600
The article on Barney's site gives the part number of the place. It
had an 800 number. My extensive research (typing and
finding that's not it, then typing enco manufacturing in my Google side
panel of Mozilla :-) yields and searching on the part
number 331-1124, gives $5.52.

So I have a couple of questions on this proceedure.

I don't understand the sharpening of the other end. I understand why,
I don't understand the how.

And in the actual reaming. What are we doing here? Do we:
ream out one side
put in one new bush
ream out the other side
put in other new bush
proceed with installing the throttle shaft?

This thread lead me to believe that we'd need to ream after we put the
bush in, maybe I didn't read well.

This is my January project. I gotta get a ceiling up in the laundry room
in December. :-) And finish painting my wheels this month.


MonteMorris wrote:
> Thanks Kelvin. Do you know of a source for a reamer that would be long
> enough to ream out both the bushings for the standard throttle shaft?
> Monte
> ----- Original Message -----
> From: "Dodd, Kelvin" <>
> To: "'MonteMorris'" <>; "MG list" <>
> Sent: Monday, November 25, 2002 10:22 AM
> Subject: RE: rebuilding SU's
>>Any time you press a bushing into an interference fit hole, there will be
>>some compression of the inner diameter.  Good machining practice is to
>>always ream out the ID of any bushing after installation to ensure
> accurate
>>The ID must be accurate!  The only way to ensure accuracy is to run a ream
>>of the correct size through the bushing pair.  This also ensures that they
>>are in accurate alignment.
>>This is the difference between correctly rebuilding a component, and
> codging
>>one together.  In many cases codged parts work ok, but may end up with
>>binding or uneven working reistance.
>>>    2. If you did use these bushings, did they have to be
>>>reamed internally
>>>for the Moss STANDARD throttle shafts? The internal diameter
>>>SHOULD be the
>>>same as the supplied shafts, but according the  "Are You
>>>Rebuilding Your
>>>Carburetor" insert on page 77 of the newest Moss catalog
>>>(which says "press in
>>>the new ones and drill and ream them to fit the new throttle
>>>shaft"),  I'm
>>>interpreting this to mean they need to be re-reamed for the
>>>standard shafts to
>>>fit. This really doesn't make sense to me so can someone enlighten me?

Paul T. Root                    E/Mail:
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Minneapolis, MN  55413          WRK: +1 (612) 664-3385
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