2004 Official factory service manual for Yamaha YFZ450S ATV Quad., Page 195Get this manual
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OIL PUMP EBS00317
Inner-rotor-to-outer-rotor-tip clearance 0.070.12 mm (0.00280.0047 in) Limit: 0.20 mm (0.0079 in) Outer-rotor-to-oil-pump-housing clearance 0.090.17 mm (0.00350.0067 in)