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.
The 014 VERTICAL HEAD [MOD:HYM 939] schematic contains the largest amount of parts with one hundred twenty listed products.
The Ducati HYM939 2018 UK (HYPERMOTARD 939) D230-00018 parts-list contains one thousand four hundred five parts.