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 fifty-eight listed parts.
With these XL650V TRANSALP 2000 (Y) EUROPEAN DIRECT SALES / 25K partsfiches you have access to one thousand two hundred eighty-seven spares.