first check points gap 16 tho,then ign timing.next check air fillter clean,oil bath?
choke settings,when choke fully off fast idle screw should just be touching cam ,i think correct adjustment is back off till clear then turn in till just touching then two turns ,if some one has tryed adjusting normal idle with this it will afect cold idle.make shure choke moves free over tight air fillter clamp can distort carb and cause sticking,then adjust idle mixture and speed try from cold,may need to tweek