To discover exactly which parts you require use the on-line schematic exploded diagram - it will even give you some idea of where and how to fit those new parts.
This parts-list page (RADIATOR) contains the most products with seventy-two listed parts.
Access sixty-nine schematic parts-list fiches for ZX750J1 ZXR750 1991 EUROPE UK FR AR FG GR IT NR SD SP ST.