Parts such as the 011 Alternator-side Crankcase Cover: Gasket 0.6 Mm, Screw Tcei M6x18, Gasket 1.0 Mm, Circlip are included in the M620 2004 Eu (monster 620) 9151-1402c 011 Alternator-side Crankcase Cover parts fiche.
On this parts fiche the Screw Tcei M6x25 is the most specified component.
The most expensive part in this assembly is the Flywheel.