This is answered within the two threads I posted for you in the other forum.

Yes, the low speed needle affects the setting of the high speed needle. You first need to set the HS for max rpm then back off 2-3 clicks. Then throttle down to a RELIABLE idle speed. Try rolling the throttle a few time from idle to wide open throttle (WOT). If it stumbles, turn the low speed needle in 1/8 turn and try again; repeat until it transitions from low to high without stumbling. If you aren't sure where the LS needle set is at this point,start by closing the throttle fully, then closing the LS needle all the way and backing it out ONE turn. Then try the above adjustment.

When you get the engine transitioning fine, you THEN have to go back and readjust the HS needle again (max rpm then back off 2-3 clicks). Hope this helps!

Good luck.

G~