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 system check
Remove the spark plugs and
reattach them to the spark
plug caps.
Put the engine stop switch in
the "" position and ignition
switch in the "on" position.
While holding a spark plug
with its base firmly against the
engine, push the electric
starter butt ...
Clutch parts inspection
Refer to “clutch removal” and “clutch installation” .
Clutch drive and driven plate
Note
wipe off the engine oil from the drive and
driven plates with a clean rag.
Measure the thickness of drive plates with a vernier
calipers. If the drive plate thickness is found to have ...
Air valve removal and installation
Removal
Remove the wheel assembly. Refer to “front wheel assembly removal and
installation” and “rear wheel assembly removal and installation” .
Remove the tire. Refer to “tire removal and installation” .
Remove the air valve (1) from the wheel.
Installation
Install th ...