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Idle speed fluctuation

To: triumphs@autox.team.net
Subject: Idle speed fluctuation
From: Mickylong@aol.com
Date: Sat, 15 Mar 2003 17:21:25 EST
I just finished reinstalling the carbs I rebuilt on my 6 and seem to be 
experiencing an idle speed problem.  Before spending a day or two 
troubleshooting and tuning, I thought I'd see if anyone here has experienced 
this:  When idle screws are set to give a 900-1,000 rpm with engine warm, I 
get a random increase in idle speed to about 1,500 - 1,800 for about ten 
seconds then back to 1,000.  Choke is all the way in.  This happened about 3 
or 4 times during a five minute period.  No adjustments were made during this 
time.  Could I have a bad needle valve? 

On my carb set only one bypass valve is adjustable and I haven't fooled with 
this yet

I've got all the emission hoses replaced correctly for a '72.  Again, have 
done no mixture adjust or synchronizing yet.

Any (hopefully easy) suggestions from the list?


Micky Long, Atlanta
72 TR 6

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