10. FINAL REDUCTION (MXU 50/MX'ER 50) ATV 50 Inspect the final gear and final shaft for wear, damage or seizure. Drive Shaft Bearing Check the left crankcase bearings for excessive play and inspect the oil seal for wear or damage. Final Shaft Bearing Countershaft Bearing Oil Seal Inspect the drive shaft and gear for wear or damage. Check the transmission case cover bearings for excessive play and inspect the final shaft bearing oil seal for wear or damage. Do not remove the transmission case cover except for necessary part replace- ment. When replacing the drive shaft, also replace the bearing and oil seal. Drive Shaft Bearing 10-4