The reference screw, the painted one, was #1 throttle body.
Would have to make up a temp external fuel tank or extend the fuel line & pump wiring.
Yup, #1 is reference (closest to clutch) and is dabbed with white paint.
Accessing the screws is a PIA.
Remove seat
Remove tank 'belt' in front of seat.
Undo front gas tank bolts
Loosen rear gas tank bolt.
Disconnect vent tube(s)
Lift tank.
Detach clip on fuel line, then fuel line
Disconnect 2 electrical connectors
Remove rear tank bolt.
Lift off tank.
Now, to get to the TB's.
Remove Tbar
Undo heat shield but removing the single snap screw is a huge PIA.
Bend the heat shield to shit removing it.
Spend about a minute looking for the vacuum taps.
Spend another 20 minutes looking for the TBS screws.
Hook up tester.
Reinstall fuel tank using the rear mount only.
Prop up tank high enough so you can get your hand in there.
Fire up bike.
Realize the flexible shaft screwdriver specifically for this job will probably be handy for something else in the future because it's useless to access the air screws on the Gen III.
Dig out a short shaft jewelers screwdriver that will work.
Realize you forgot exactly where the air screws were.
Remove tank, put some index marks on the fuel rail.
Reinstall tank
Run out of gas while adjusting the screws because the fuel pickup is uncovered.
Put more fuel in the tank.
Adjust air screws.
Reverse disassembly.