twenty-six components are shown in this Rm250z 2006 (k6) Usa (e03) Crankcase (model K1/k2) exploded diagram.
Some items from this specific schematic: Bolt,crankcase, Gasket(6.2x11x1).2 (nas), Bout, Screw.
In this schematic the "Bolt,crankcase" is used most often.