NOVAROSSI ENGINE TUNING
hsn is the control valve, set the control valve to limit high rpm's first when final race tuning . after doing so go to the lsn and lean until the engine keeps a consistent idle but does not ting when idling or starve for fuel as a quick throttling is applied , that is caused from lack of fuel on lsn . lower the idle until it is as low as you can get it and it will maintain a good safe idle during on track deceleration and on the bench for at the least 20 sec.
after you do the low end you will usually have to richen the hsn about 1-2 hours

there will be a few things that will need to be tweaked slightly but that will get you in the ball park .

OTHER ENGINES TUNE DIFFERENTLY !!!!

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the needles do effect one another yes , you need to find the proper balance between hsn and lsn , once this is done that balance doesnt change much .