11.CRANKSCASE/CRANKSHAFT Mongoose/KXR 90/50 Drive a new crankshaft bearing into the right crankcase. Special Oil seal and bearing install E014 Oil Seal And Bearing Install Drive a new crankshaft bearing into the left crankcase. Special Oil seal and bearing install E014 Oil Seal And Bearing Install 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 Crankshaft install tool E016 Crankcase Install Tool 11-10