Well, yeah - I dont really fall for it , but its true that saitos come with a uselessly rich settings which differs from engine to engine.. (a guy with a screwdriver at final control at Satio factory??)

I re-tune all needles before firing the engine up for the first time, then fine-tune it to the leanest & meanest.. But some engines are simply not balanced mechanically inside. therefore you cant get rid of vibration no matter what.

I see people say "i havent touched the LS needle".. well chap; then you didnt tune it IMO..