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Old 10-10-2010, 11:07 AM   #7
Easy Rider
Senior Member
 
Join Date: May 2007
Location: Champaign, Illinois
Posts: 4,561
Re: Needle shim modification

Quote:
Originally Posted by majorgz
so just changing the air fuel mixture screw is the same as shimming the carb ????
NO.
The mixture screw mostly affects speeds at idle or near to idle with small throttle openings.
The shim affects mostly mid-range throttle positions.
The main jet is for higher RPMs at wide throttle positions.

(Blaine: Perfect!!) :biggrin:
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