1986-1991 Kawasaki 650 X-2 Service Manual, Page 42Get this manual
3-4 ENGINE LUBRICATION SYSTEM If the o.il pump output is subnormal, inspect the oil pump, and the inj,et and outlet hoses for oil leaksIf oil leaks are not found, replace the oil' pumpNOTE
eTighten the mounting nuts, reconnect both oil hoses securely and bleed the air from the system (see Oil Pump BI'eeding)
OA check valve is built into the oil pump and can not be removed
Oil Pump Removal
eSqueeze the ilnlet hose to restrict oil flow and dis connect it from the oil pumpePul1 off the outlet hose, remove both mounting nuts and take off the oil pump and the Oring
Oil Tank