I got a 1986 suzuki 230lts it has been sputtering and spiting when you add a a little throttle so i took apart the crab to look for crap, i found not a speck of dirt. BUT i found that the pilot screw was messing a few parts, the washer and the o-ring. would that cause it to sputter when a little throttle is applied, it almost feels like the breaks are dragging when you give it a little throttle. thanks for any imput!

 

Did you just shoot carb cleaner or air in it? Or did you completely take everything apart inside the carb? As far as the parts missing you can buy a rebuild kit. Or adjust it out enough for the missing parts perhaps.