Adjust the engine idle speed periodically on the engine at normal operating temperature.
To adjust the idle speed:

Engine oil and filter change
Throtile cable playOil pan / oil pressure regulator / oil strainer
removal and installation
Note
the oil pan/oil strainer/oil pressure regulator
cannot be serviced with the engine installed
in the frame.
Removal
Remove the engine assembly from the frame. Refer to “engine assembly
removal” in section 1d .
Remove the plate (1).
Remove the oil pan ...
Cylinder head related parts inspection
Refer to “cylinder head disassembly and assembly” .
Cylinder head distortion
Decarbonize the combustion chambers.
Check the gasket surface of the cylinder head for
distortion. Use a straightedge and thickness gauge.
Take clearance readings at several places. If
readings exceed the ...
Fuel mesh filter inspection and cleaning
Inspect the fuel mesh filter in the following procedures:
remove the fuel mesh filter. Refer to “fuel pump disassembly and
assembly” .
If the fuel mesh filter is clogged with foreign particles,
it hinders smooth gasoline flow resulting in loss of
engine power. Such a filter ...