Screw, worm to ensure of speedometer drive - JAWA ČZ ČZ 250 typ 471 - two cylinders ČZ ČZ 350 type 472 - two cylinders JAWA 250 Bizon type 623 JAWA 350 Bizon type 633 JAWA 350 type 18 (Pérák) JAWA 350 type 360 (Panelka) JAWA 350 type 361 (Sport) JAWA 350 type 362 (Californian) JAWA 350 type 634 JAWA 350 type 638 TS JAWA 350 type 639 TS JAWA 350 type