Some items from this specific schematic: Cover,clutch, Bolt 6x50, Gasket,clutch Cover (mca), Pin.
This CRANKCASE COVER assembly utilises twelve Bolt 6x35(s) - the highest specified component.
The most reasonably priced component used on the Gs450s 1988 (j) (e04 E22 E34 E77) Crankcase Cover is the Bolt 5x16.