so, the title is " ken oconner spindles"
yet below you say you're using rappy 660 spindles and calipers ?
which is it ? oconnor or rappy spindles ?
i had a situation like that doing my buddies hydro conversion, although we were using the old norman420 spindles, before ken got them, yfz hubs/discs would not go onto the spindle completely, seems the I.D. of the hub bearing is a smaller diameter than the bushing norman and ken use on the hydro conversion spindles.
they are made to accept a banshee or raptor(?) hub.
is it possible those are yfz hubs and not rappy ?
i do believe that all the O.D.'s of the bearings are the same, and a switch to a banshee inner bearing with the larger I.D. may solve your problem ?
have a look to see if the bearing is infact seating completely onto the bushing ?
btw...the way norman420 made these, a washer as a spacer at that gap you show was required, i've done 3 sets.
i believe ken has eliminated the need for that washer by spacing his bracket differently than norman did ?
but neither had the large gap you show.