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 playWiring diagram
Refer to “wire color symbols” in section 0a .
For e-02, 19, 24, 51
For e-03, 28
For e-14, 33
...
Steering / steering damper related parts
inspection
Refer to “steering / steering damper removal and installation” .
Inspect the removed parts for the following
abnormalities:
Steering stem
Distortion of the steering stem and brackets.
Bearing
Bearing wear or damage
abnormal bearing noise
race wear or damage
&nbs ...
Oil jet inspection
Refer to “oil jet removal and installation” .
Oil jet
Make sure that the oil jets are not clogged. If they are
clogged, clean their oil passage using a wire of the
proper size and compressed air.
Piston cooling jet
Oil jet (for transmission)
Oil jet (for cam chain te ...