Ball bearing 6203 2Z NR, Maxi early version.

The inner and outer bearing race are the same thickness. Fits Maxi early version, right side main bearing. For Maxi of late design, the inner bearing race is 1 mm narrower, then the crankshaft must also be changed to one of late design. Sold individually, 2 in the picture to show from more directions. The bearing can also have the designation 6203 ZZ which is the same bearing. Z+Z = 2Z = ZZ