12. CRANKCASE/CRANKSHAFT ATV 50 Drive a new crankshaft bearing into the right crankcase. Special tool: Oil seal & bearing driver A120E00014 Oil Seal & Bearing Driver Drive a new crankshaft bearing into the left crankcase. Special tool: Oil seal & bearing driver A120E00014 Oil Seal & Bearing Driver Install the crankshaft into the left crankcase. · Apply KYMCO ULTRA motor oil or molybdenum disulfide to the crank- shaft bearings and connecting rod big end. · Apply grease to the lip of the oil seal and then install it. Special tool: Crankcase assembly tool (left crankcase) A120E00024 Crankcase Assembly Tool 12-6