PGO PMX Sport 50 Service Manual page 15

Check the oil level in gear box
Is too much or dirty
Oil level is normal
Check the combustion
color of cylinder head
Normal
Check engine overheat
Or not
Not overheat
Running accelerately or
High speed continuously
No knocking
Oil level is
Not normal
Abnormal
overheat
knocking
•oil level is too high
‚oil level is too low
ƒoil does not interchange
•oil route is blocked
‚ insufficient oil pumping from
oil pump
•piston and cylinder worn out
‚mixture is too lean
ƒbad quality of the fuel
„
too much carbon in the combustion room
...ignition timing is too early
•
too much carbon in the combustion room
‚bad quality of the fuel
ƒclutch slip
„mixture is too lean
... ignition timing is too early