Bottom Line - You can't...Victory designed it so you can't!!!
It's an all day job (at a minimum)...I was thwarted at every step yesterday to get it out any other way and gave up...you have to remove the entire Throttle Body assembly and all the shit attached to it and then drop the airbox down to get it out. Because you have to remove so much shit, you also have to order new gaskets, O-Rings and teflon washers...and the potential goes up exponentially that you will break something else while in there because the bikes are so old...
I'll try again when I'm less pissed off and frustrated...I can't understand for the life of me how they design anything that forces you to take the entire bike apart to get to the major wear items...and don't even try and change the fuel filter and fuel pump...OMFG how much of a PITA it is to take out that the SHOCK!
If I had know in advance how impossible this bike is to work on yourself (and I'm a pretty accomplished amateur mechanic) I wouldn't have bought it...but anyway...that's another story...
Anyway - From the actual repair manual, you have to take the Thottle Body out first and then drop the air box down to get it out...and if it's you're removing it for a TPS change...then you just change it from when you have the throttle body out since you can't get to that with the air box in the way.
1) Remove Seat & Fuel Tank
2) Remove Air Box Cover (5 bolts I think)
3) Remove Intake Tubes & 4 Hex Throttle Body bolts
4) Remove Throttle Body adapter to throttle body bolts and fuel rail mounting bolts
5) Remove fuel rail attachment bolts and fuel return line from fuel rail
6) Remove Throttle and Throttle Return cables
7) Remove Fast Idle Cable and throttle return cables
8) Remove fast idle cable
9) Remove TPS Wiring connector
10) Remove oil cooling delivery tubes from cylinder adaptors. Do not reuse teflon washers or O-rings
11) Remove Throttle Body out the right side
Then you can take out the air box...
Good luck...Until I can dedicate a full day for this stupid simple repair of the TPS and fuel pump, I'll ride my trusty and reliable Kawasaki Vulcan 1500...