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4. LUBRICATION SYSTEM MXU 550EXi/MXU500i
SERVICE INFORMATION
GENERAL INSTRUCTIONS
· The oil pump service may be done with the engine installed in the frame.
· When removing and installing the oil pump use care not to allow dust or dirt to enter the engine.
· If any portion of the oil pump is worn beyond the specified service limits, replace the oil pump as
an assembly.
· After the engine has been installed check that there are no oil leaks and that oil pressure is
correct.
SPECIFICATIONS Unit: mm
ITEM STANDARD SERVICE LIMIT
Engine oil At draining 3 liter
capacity At disassembly 3.6 liter
KYMCO 4-stroke oil or equivalent
motor oil
Recommended engine oil
API service classification SJ
Viscosity: SAE 5W-50
Tip clearance 0.15 max 0.2
Oil pump rotor Body clearance 0.15 0.2 0.25
Side clearance 0.04 0.09 0.12
TORQUE VALUES
Oil pump screw 0.3 kgf-m (3 N-m )
Oil strainer screen cap 1.5 kgf-m (15 N-m) Apply oil to the threads and seating surface.
Oil filter cartridge 1 kgf-m (10 N-m) Apply oil to the threads and seating surface.
Oil pipe bolt 3.5 kgf-m (35 N-m) Apply oil to the threads and seating surface.
Special tool:
Oil seal & bearing drive A120E00014
4-2