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 playPrecautions
Keep away from fire or spark.
During disassembling, use care to minimize spillage of
gasoline.
Spilled gasoline should be wiped off immediately.
Work in a well-ventilated area.
For e-33 models, drain fuel from the fuel tank before
...
Front brake master cylinder / brake lever disassembly and assembly
Refer to “front brake master cylinder assembly removal and installation” .
Disassembly
Remove the reservoir cap (1), plate (2), diaphragm
(3) and reservoir tank (4).
Remove the brake light switch (5) and brake lever
(6).
Remove the dust boot (7) and push rod (8).
  ...
Carrying a passenger
Before you invite someone to be a
passenger on your motorcycle,
you need to be thoroughly familiar
with motorcycle operation. Adjust
tire pressures and suspension
according to the tire pressure
and loading section and the suspension
section of this manual.
The passenger should always
hold ...