On this parts fiche the Bolt-wsp-small,8x20 is the most specified component.
Parts such as the Engine Mount: Damper,engine Mount, Bolt,10x25, Bolt-wsp-small,8x20, Shim,t=0.5mm are included in the Jh750-b2 Jetskisupersportvxi 1994 Usa Canada Engine Mount parts fiche.
The Shim,t=0.3mm is the cheapest item from this partsfiche.