OEM STOCK SWITCH FOR ALL 1991 THRU 1999 Z50R'S BUT THERE IS NO REASON IT WON'T WORK FINE FOR THE 1979 TO 1990 Z50R'S TOO. IT TAKES THE SAME LEVER AND LEVER SCREW. ALSO THE SAME THROTTLE PIPE AND THROTTLE CABLE CONNECTOR THREADS. does not come with the 28mm and 35mm x 5mm screws 266X @ *SCREW, PAN 5x28 93500-05028-0A 1/20A (R2257) R2257 @ *SCREW, PAN 5x35 1/19A (92E) 92E @ *THROTTLE/GRIP Z50R_94_TO_99 53140-GW8-315 53140-GW8-305 1/21M (291Y) 291Y @ *THROTTLE PIPE Z50R 1979_to_1993 53141-147-010 53141-147-030 1/22M (201E) 201E @ **GRIP_SET CT70_80_to_94 Z50R_79_to_99 53166-181-000 53165-181-000 7/20M (9D/9E) 9D/9E @ RIGHT SIDE LEVER (REPLACES_OEM_53175_147_671) CT70_80_TO_82 Z50R_79_TO_99 XR50_ALL_YEAR 7/16W (207B) 207B 44-161 @ **PASSPORT_ALL BRAKE_LEVER (CT70_80_TO_82) (Z50R_86_TO_99) 53175-GEL-305 superseded by 53175-GGA-305 1/21M (63P) PIC? 63P @ *#11_LEVER PIVOT_SCREW XR50_CRF50 C70_81_TO_83 Z50R_86_TO_99 90115-170-700 1/22M (64D) 64D @ *5mm_HEX_NUT MANY_HONDA APPLICATIONS 94001-05000-0S 1/22M (BXR5_203) (xr5203) BXR5-203