Now thinking a bit more about it you could have a new gearbox designed , manufactured and installed for about the price difference between the two bikes
so I say go for it
Every-time someone starts complaining about this or that please for a second compare the price difference between the items.
Rockets are not designed to be the smoothest bike on the road they are built for one reason only pure grunt now riders try and soften them up with windshields, radios etc etc but it is a bike for the hard rider not the Sunday cruiser.