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.
With thirty-nine products listed, the CRANKCASE/OIL PUMP parts diagram contains the most products.
With these SGX50 SKY 1999 (X) SPAIN / 50T partsfiches you have access to five hundred forty-one spares.