Comprehensive wheel swap list?

[Ruby Racing]

As long as the rear bearings on the donor wheel are same size or bigger than the Fazer ones then making up new spacers would be very easy, i guess width is the main consideration since wider wheels are likely to have wider hubs as well?

I would suggest the better option would be to source new bearings with the correct inside diameter for the axle your using. That's what I've done with the KTM rear wheel on my project bike as the KTM bearing ID was something like 25mm but the EXUP swing arm I'm using uses a 20mm axle.