2004 Official factory service manual for Yamaha YFZ450S ATV Quad., Page 27Get this manual
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ENGINE SPECIFICATIONS EBS01002
Exhaust
Camshaft runout limit
31.20031.300 mm (1.22831.2323 in) 31.100 mm (1.2244 in) 22.55022.650 mm (0.88780.8917 in) 22.450 mm