2004 Official factory service manual for Yamaha YFZ450S ATV Quad., Page 209Get this manual
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CRANKSHAFT
INSTALLING THE CRANKSHAFT 1 Install: crankshaft Crankshaft installer pot PN90890-01274 Crankshaft installer bolt PN90890-01275 Crankshaft installer set PNYU-90050 Adapter PNYM-90063,