10. FINAL REDUCTION (MXU 50/MX'ER 50) ATV 50 Drive new bearings into the left crankcase. Install a new drive shaft oil seal. Special tool: Oil seal and bearing installer A120E00014 Bearing Outer Driver Drive Shaft FINAL REDUCTION ASSEMBLY Install the drive shaft into the left crankcase. Install the final gear and final shaft into the left crankcase. 10-6