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 playIgnition switch inspection
Inspect the ignition switch in the following procedures:
remove the air cleaner box. Refer to “air cleaner box removal and
installation” in section 1d .
Disconnect the ignition switch lead wire coupler (1).
Inspect the ignition switch for continuity with a tester.
If ...
Oil pressure switch inspection
Inspect the oil pressure switch in the following
procedures:
Note
before inspecting the oil pressure switch, check if the engine oil level
is correct. Refer to “engine oil and filter replacement” in section 0b .
Remove the left side cowling. Refer to “exterior parts removal ...
Transmission related parts inspection
Refer to “transmission removal” , “transmission installation” and
“countershaft gear / driveshaft gear disassembly and assembly” .
Gearshift fork to groove clearance
Note
the clearance for each gearshift fork plays
an important role in the smoothness and
positiveness of the ...