2003 Yamaha YFM400FAR Kodiak Factory Service Manual, Page 425Get this manual
BALANCER GEARS AND OIL PUMP
INSTALLING THE BALANCER DRIVE GEAR AND BALANCER DRIVEN GEAR 1.Install: Pin Spring Balancer drive gear (onto the buffer boss) NOTE: Align the punch mark on the balancer drive gear with the keyway on the crankshaft2.Install: Plate NOTE: Install the plate with the identification mark "F" facing away from the balancer drive gear
3.Install: Balancer driven gear NOTE: Align the punch mark on the balancer drive gear with the punch mark on the balancer driven gear