Alu housing
Assembly
Center
Outerring
Some suggestions. Take the dimension of the material that will be welded to the center and to the housing larger than on the drawing. After welding some machining is needed to come to the wanted dimensions. In general check the dimensions of your clutch against the dimensions of the drawing not sure all Suzukis are identical and there will be tolerances also.
For the overrunning bearing I suggest to use a loctite to attach to the bore and the housing. This can be undone by heating in case disassembly is needed.
The nut can be made from two nuts by welding a bush inbetween and turn it on the lath.
Between the two bearings a spacer is needed of 1 mm thickness.
I did not check the fit of the plastic cover. Probably a hole needs to made where the longer nut is located.
I hope this is enough to do the modification.
Jan