The thirty-five Dr250s 1987 (h) (e01 E04 E06 E15 E21 E22 E24 E39) Crankshaft component parts are all listed in this schematic.
Parts such as the Crankshaft: Piston, Retainer,crankshaft Bearing,r, Sprocket,cam Chain Drive(nt:21, Gear,crank Balancer Drive are included in the Dr250s 1987 (h) (e01 E04 E06 E15 E21 E22 E24 E39) Crankshaft parts fiche.