specifically wheels
yes with caveat: 2009 ulysses and all 2010 REAR WHEELS 3 bearing design and do not interchange with 2 bearing wheels. they will mount up but you need the left side spacer and seal along with the 3 bearing axle.
seats
no
airbox
yes with caveat. they all mount up the same but inner covers and bases vented differently thru model years. all airbox covers will mount up to any XB......9 inner cover IEV free.....12 inner cover holds the IEV actuator assembly.
bars
they will "bolt up" but differences in bar height/width/pullback and ulysses/cityX/Stt are cross-braced.
ecm's
no
you're welcome.