THIS CARB WILL BOLT RIGHT ON THE 86 TO 99 Z50'S. BUT IF YOU CAN STILL USE YOUR OLD TOPSET (THE PART THAT SCREWS ON TOP) THIS WILL ALSO WORK ON THE 1976 Z50A THRU 1985 Z50R. *CARB (CRF50_06_TO_07) CAN_WORK_ON (Z50_76_TO_99) 32MM_PATTERN 7/16A (60A) 60A$97.99 6MM X 35MM CHROME FLANGE BOLT 6MM X 35MM CHROME$0.35 *TOP_SET_FITS LOTS_OF_UNITS SEE_DISCRIPTION 16014-GB1-912 discontinuedREAD BELOW FOR FITMENT!!!! Z50R ALL XR50 ALL CT70 K0 THRU 1977* CT90* not for k2 and k3 models TRX90* FOR CUSTOM CABLES CT200 ALL CM91 ALL ST90 ALL ATC90 ALL ATC70 73 & 74 *SOME EARLY MODELS HAVE A TALLER SLIDE AND UNLESS YOU REMOVE THE TOP 1/8" OR SO OF THE SLIDE PISTON YOU MAY NOT BE ABLE TO GO FULL THROTTLE. click to see bigger diagram *MAIN_JETS 1982_to_2011 Z50R_XR50_CRF50 LARGER_SIZES 7/14A (201B) (201C) (250W) **CARB PACKING SET Z50 "79" TO "99" ALL_XR50_&_CRF50 7/16M (73M) 73M$15.35