2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 168Get this manual
OIL PUMP AND BLANCER WEIGHT GEAR
REMOVING THE BALANCER WEIGHT GEAR AND OIL PUMP 1Straighten the lock washer tab2Remove: Balancer weight gear nut Lock washer Balancer weight gear NOTE: Place the aluminum plate between balancer drive gear and balancer weight gearand then loosen the balancer weight gear nut 3Remove: Oil pump assembly