Parts such as the Oil Pan - Oil Pump - Fuel Pump (model W): O Ring(d:2.62,id:20.3), Plug, Gasket(5.8x11x1.2) (nas), Strainer,engine Oil are included in the Gsxr750 1999 (x) Oil Pan - Oil Pump - Fuel Pump (model W) parts fiche.
The Pin is the lowest priced item on this Oil Pan - Oil Pump - Fuel Pump (model W) schematic.
In this schematic the "Bolt,g/s Switc" is used most often.