Main shaft 13t. (SK) - JAWA-ČZ, ČZ 450-475, 501-505 Can be used for: JAWA-ČZ 125 type 355 JAWA-ČZ 175 type 356 ČZ 125 type 453, since 196- ČZ 125 type 473 since 196- ČZ 175 type 450, since 196- ČZ 175 type 470, since 196- ČZ 250 type 455, since 196- ČZ 250 type 475, sinceu 196- ČZ 175 type 501, year 1958- ČZ 175 type 502, year 196- ČZ 175 type 505