G54b Help

[ragragtimetime]

assuming the timing is correct/close & wires not crossed: check for defective spark plug, defective coil wire or coil, vacuum advance leak or mechanism issue, fuel pump worn, leak in fuel line/fittings, restricted fuel filter/pinched feed line....pull the new plugs & see if they give any clues.

[Kronustor]

I've been doing some digging around and finally found some stuff on the carburetor.
http://www.mightyram50.net/vbulletin...ther-gets-cold
In the first picture where it says mixture adjustment screw, my carb has a whole but no screw in sight. How do i go about replacing the screw?