10. CRANKCASE/CRANKSHAFT ZX / SCOUT 50 Dowel Pins CRANKCASE ASSEMBLY Install the dowel pins and a new gasket to the crankcase mating surface. Assemble the crankcase halves. Crankcase Assembly Tool The distance between the right crankcase oil seal and crankcase surface is about 12.50.5 mm. Crankcase Assembly Tool 10-7