DAELIM S4 50cc Service Manual page 46

LUBRICATION SYSTEM
TROUBLE SHOOTING
Oil level low
●Natural oil consumption
●External oil leaking
●Worn piston ring or incorrect piston ring installation
●Worn valve guide or valve stem seal
Oil contamination
●Oil or filter not changed often enough
●Faulty cylinder head gasket
●Piston ring worn
Low or no oil pressure
●Clogged oil filter screen
●Incorret oil used