you need to lean down the idle mix screw tell it runs rough then turn up the idle speed screw. then when it runs good you turn down the mix screw just about 1/8 to 1/4 turn . Look in the manual section for the UTI training manuals> Fuel section> Lean drop

You can also look here. Last Post.
http://www.mightyram50.net/phpbb3/vi...ean+drop#p8692