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 playSpecial tools and equipment
Recommended service material
Note
required service material is also described in the following.
“Drive chain related components”
Special tool
...
Drive chain cleaning and lubricating
Clean and lubricate drive chain
every 1 000 km (600 miles)
Clean and lubricate the drive chain in the following
procedures:
clean the drive chain with kerosine. If the drive chain
tends to rust quickly, the intervals must be
shortened.
Caution
do not use trichloroethyle ...
Gearshift shaft / gearshift cam plate components
Gearshift shaft
Gearshift cam drive plate
Gearshift cam plate
Gearshift cam stopper
19 N·m (1.9 Kgf-m,
13.5 Lbf-ft)
13 N·m
(1.3 Kgf-m, 9.5 Lbf-ft)
8.5 N·m
(0.85 Kgf-m, 6.0 Lbf-ft)
Apply grease to oil
seal lip.
Apply thread l ...