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Re: Throttle Shaft leakage

To: Marc Siegel <smarc@abs.net>
Subject: Re: Throttle Shaft leakage
From: Charles & Peggy Robinson <ccrobins@ktc.com>
Date: Fri, 10 Sep 2004 06:12:14 -0500
  You may not need any bushing work.  New standard-size shafts may solve 
the leakage problem. The usual wear point is at the linkage end of the 
shafts, on the lower circumference.  This is because of the side force 
on the shafs caused by the return springs.  Also, it would appear that 
the bushings are made of harder material than the shafts.  There's an 
easy way to find out if the bushings need attention.  Remove the carbs 
to the workbench.  Remove the linkages from the butterfly shafts and 
remove the butterfly plates.  Slide the shafts out a small amount to an 
area where there is no wear.  Check to see if you can feel any sideways 
play.  If you can't feel appreciable side play, new standard-size shafts 
will likely cure the leakage problem.  This was the case with the HS 
carbs that are currently on my engine.  I put in new shafts over 5 years 
ago and they're still OK.

    Cheers,

     CR

Marc Siegel wrote:
> Looks like I have a "slight" leakage problem at the throttle shafts. 
> 
> Curious as to the wisdom of using oversized throttle shafts as opposed to
> having them rebushed... I think rebushing sounds like the right way to go,
> although not as quick since I have to send'em out...
> 
> Is one method really any better than the other?

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