Remove fuel tank, cheese wedges, IAC bracket, IAV has 2 O rings you put on, IAC has 3 connections, 2 small tubes and 1 larger middle tube, 3 tubes connect to IAC using 3 way rubber connecter, remove rubber connecter and carefully cut out the larger middle connecter, cut 1/2" off and keep, keep and re-use 2 smaller rubber connections, hold IAC bracket against bike to make sure IAV adjusting screw is under IAC in order to adjust when fitted, lube O ring side of IAV and carefully push into middle nipple of IAC, fit the larger middle shaped plastic tube into the opposite side of IAV and slide heat shrink over, this is the tricky bit
fasten IAC bracket with IAV on engine and route larger middle shaped tube through engine so it can be tie wrapped to LHS cheese wedge bracket, with plastic tube being shaped make a mark on IAV so if it moves when removing it to heatshrink, when happy with routing of shaped plastic tube remove IAC bracket and apply heat to shrink down on plastic tube and IAV, re-route plastic tube through engine, connect 2 smaller tubes on IAC, IAV is in the middle, fasten IAC bracket, 1/2" piece of tube place on end of shaped plastic tube and use insulation tape to stop it falling into small filter, tie wrap filter end of tube, the other small fiter goes on engine breather pipe, place filter next to breather pipe and mark breather were your gonna cut if you have to, make sure fuel tank doesnt squash filter.
Mine is a 2010 vegas with torque tubes fitted.
I bought a piece of flexible tube the same size as the hard shaped plastic tube and used that instead, easier to route through engine and tie wrap to bracket.
Hope this helps, i found instructions confusing