10.FINAL REDUCTION/ TRANSMISSION SYSTEM MXU 300/250 Replace a new O-ring and apply engine oil to the O-ring. Install the secondary driven bevel gear into the transmission case cover. Align the mark on the secondary bevel driven gear shaft case with the index mark on the transmission case cover. O-ring Marks Bolts Shift the shift shaft to neutral. Install and tighten the four bolts in several steps until the driven bevel gear shaft case evenly touches the transmission case cover. Then, while rotating the driven bevel gear shaft, tighten the bolts in a crisscross pattern in several steps. It is important to turn the driven bevel gear shaft while tightening the bolts. If the bevel gear shim is too thick, the gears Driven Bevel Gear Shaft Case will lock after only light tightening. Speedometer Gear Install the speedometer gear and washer. Install the plug and tighten it. Washer Plug 10-28