But they will fit (probably) The front is a 3.5x17" I guess I can get bearings made up ... or sleeved or something.
The rear is a full 5" which might get a bit snug on the swinger but that's for later.

yeah i realized the fzr bearings would be different to the dymags
but as you'd asked i thought you had a plan in mind, as oolit said with both sizes being known you can work out what you need to make it all fit together, and i would still recommend ashley bearings (power)
http://www.ashleypower.co.uk/
cos if a bearing exists these chaps will have one as well as chains, sprockets, ball joints, belt drives and so on

True ... ta for the link.