mika,
to tell you the truth i blow out carbys with the full pressure in the compressor, but arnt game to recomend it to anyone else lol.
its funney that it is still surging/hunting, i would say the next thing i would do would be make sure the air cleaner is clean and then wind the mixture screw as far in as it will go wile still running then start to back it off 1/2 turn by 1/2 turn till it runs smooth. if that fails i would then move onto springs and linkages ( make sure you have the right oil leavel as this can effect mechanical throttle linkages).
hope you have success regards jay
