sandonut I'm back,you-all remember 780slt rpm drop.I now am working on sl900.domestic 96 model Running rich?1/4 to wot,slobbering,turn full off.With in seconds,picks up& gone,but runs out of gas.turn gas on same thing.there is no high speed adjustment adjustment on this carbs.They are plug.How do I adjust the high speed jet or lean the fuel? . I did put spark tester on new plugs,Cheap tester,(harbor fright) color is orange,but is orange on good running machines?once more PLEASE sandonut