1985-1990 Suzuki LT50 Service Manual, Page 54Get this manual
FUEL AND LUBRICATION SYSTEM
Remove the oil pump cam screws
When removing the oil pump cam, the plunger and its spring will pop outDo not miss these two parts
Inspect the oil pump valve wall and clutch cover
bore wa ll for nick, scratches or other damage Inspect the plunger and spring for proper operation Inspect the check valve and its ring for any damageI there are anyreplace it with new