2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 213Get this manual
1E-6 Engine Lubrication System: Apply engine oil to the sliding surfaces of the oil pump inner rotor, outer rotor and shaft When installing the inner rotor (1), align the pin (2) with the groove (3) When installing the inner rotor and outer rotor, face the punched marks "A" on the inner rotor and outer rotor to the outside"A" 4
When installing the oil pump driven gear, align the pin (4) with the groove (5)
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Reinstall the clutchRefer to "Clutch Installation in Section 5C (Page 5C-9)"
Oil Pump Inspection
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When installing the oil pump assembly, align the pin "B" with the pinhole "C"