2011 YAMAHA WR 450F width

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Page 139 of 230

YAMAHA WR 450F 2011  Owners Manual 5-36
OIL FILTER ELEMENT AND WATER PUMP
REMOVING THE IMPELLER 
SHAFT
1. Remove:
• Impeller "1"
• Washer "2"
• Impeller shaft "3"
Hold the impeller shaft on its width 
across the flats "a" with sp

Page 164 of 230

YAMAHA WR 450F 2011  Owners Manual 5-61
CRANKCASE AND CRANKSHAFT
CHECKING THE CRANKSHAFT
1. Measure:
• Runout limit "a"
• Small end free play limit "b"
• Connecting rod big end side 
clearance "c"
• Crank width "d"
Out of speci
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