Some folk do not understand that the crank thrust washer must be held fast by the crank gear.( one broken engine came in missing it…guy had lost clutch when it broke up)
Best when fitting up to clamp gear with G clamp to trap the washed (or work with over size washers and grind to correct thickness.) then taper ream the pin hole till clean
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You do need a couple of thou end float ….and I always cut oil groves across thrust face of bearings to allow oil to do it’s job when the clutch is held in….I have seen a melted bearing from clutch riding.