Turn your idle up to about 1500, turn the screw whichever way makes them even out. Its best to have one manometer per carb or a tool that does multiple carbs.
After adjustment give it a rap or two on the throttle and measure again.

SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq NEW: 19 Goldwing Tour DCT