Is the shoulder of the spacer, seated against the inner bearing race when you are checking clearance of the problem clutch?
@ this point you prolly are going to have to use the one off the kt parts motor.
it will pull down to the .010 gap when you put the stamping over it and tighten the adjusting nuts.
You can swap the bearings if need, they push out, just support on the bore the bearing is in, not on the pulley, as they deform easily.
While it is apart, check your magnet coil insulation, usually they flake off.
They can be easily recovered with a 2 part epoxy, some use JB weld.
just flow it into the windings while it is setting level.
Sometimes a tight bearing can be saved/lubed with a syringe filled with light chassis grease if it is not "rough" just tight/dry,by injecting it carefully under the seal lip.
the warmer the grease the easier it injects.
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