4. LUBRICATION SYSTEM ATV 150/125 Outer Rotor Inner Rotor ASSEMBLY Install the outer rotor, inner rotor and pump shaft into the pump body. Insert the pump shaft by aligning the flat on the shaft with the flat in the inner rotor. Install the dowel pin. Install the pump cover by aligning the hole in the cover with the dowel pin. Dowel Pin Pump Cover Screw Tighten the screw to secure the pump cover. Make sure that the pump shaft rotates freely without binding. Arrow Oil Pump INSTALLATION Install the oil pump into the crankcase. Install the oil pump with the arrow mark on the pump body facing up and fill the oil pump with engine oil before installation. After the oil pump is installed, tighten the two mounting bolts. Bolts 4-6