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4. LUBRICATION SYSTEM ATV 150/125
SERVICE INFORMATION
GENERAL INSTRUCTIONS
· The maintenance of lubrication system can be performed with the engine installed in the frame.
· Use care when removing and installing the oil pump not to allow dust and foreign matters to
enter the engine and oil line.
· Do not attempt to disassemble the oil pump. The oil pump must be replaced as a set when it
reaches its service limit.
· After the oil pump is installed, check each part for oil leaks.
SPECIFICATIONS mm (in)
Item Standard Service Limit
Inner rotor-to-outer rotor clearance 0.12 (0.0048)
Oil pump Outer rotor-to-pump body clearance 0.12 (0.0048)
Rotor end-to-pump body clearance 0.050.1 (0.0020.004) 0.2 (0.008)
TROUBLESHOOTING
Oil level too low Poor lubrication pressure
· Natural oil consumption · Oil level too low
· Oil leaks · Clogged oil filter or oil passages
· Worn or poorly installed piston rings · Not use the specified oil
· Worn valve guide or seal
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