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Re: [TR] fast idle problem

To: Bob Leaver <>
Subject: Re: [TR] fast idle problem
From: Brian Kemp <>
Date: Tue, 12 May 2020 17:33:27 -0700
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References: <>
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Bob - You may want to see if you have someplace local that can ream the 
carbs for you.  One of these days I'll be taking mine to a local guy 
that rebuilds carbs out of his garage.  I have the parts from a TRF kit 
that I ordered before finding out you also needed the reamer.


On 5/12/2020 2:58 PM, Bob Leaver wrote:
> I have a 1965 Triumph TR4a that I rebuilt the SU carbs and now I can't
> get the idle below about 1500. I've tried all the screws and checked
> all gaskets and nothing. The only possibility I can come up with is
> air getting around the shafts. When rebuilding the cars I didn't
> replace the shafts because I didn't have a reamer. Moss has a reamer
> for $290.00. I looked on line and can't find a less expensive
> replacement. The book states the size of the reamer is 5/16" +
> 0.0105". What kind of measurement is this? Can you use a 5/16" reamer?
> Does anyone have ideas how I can get the idle down? Does anyone know
> of a cheaper reamer to use? Thanks, Bob
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