The most reasonably priced component used on the Ex300bhfa Ninja 300 Abs 2017 Europa,middle East,africa Crankcase Bolt Pattern(ex300aea99330-) is the Washer,6.3x13.5x1.
Parts such as the Crankcase Bolt Pattern(ex300aea99330-): Bolt,m6x85,white, Washer,6.3x13.5x1, Bolt,8x73, Bolt,6x38 are included in the Ex300bhfa Ninja 300 Abs 2017 Europa,middle East,africa Crankcase Bolt Pattern(ex300aea99330-) parts fiche.
On this parts fiche the Bolt,flanged,8x90 is the most specified component.