3. Adjustments
USE AND MAINTENANCE MANUAL CHAPTER 3
ADJUSTMENTS2-Strokes - Edition 01 / 2023
87
3
B
A
3.6 REAR-VIEW MIRRORS
(ONLY FOR XE 125 VERSION)
The operations described below apply to both
rearview mirrors.
– Place the vehicle on the kickstand and on a flat and stable
surface.
– Loosen the lock nut “A”, turn the left-hand mirror counter-
clockwise and remove it, then turn the right-hand mirror
clockwise and remove it.
During reassembly, before tightening the nut, check
that the mirror support rod is aligned with the
handlebar.
Rear-view mirror adjustment
To adjust the rear-view mirrors, get on the vehicle in the
driving position and turn the rear-view mirror according to
your needs. It is also possible to adjust the inclination of the
rear-view mirror support rod. To carry out this operation,
loosen the screw “B” and move the support rod sideways.
Adjust and tighten screw “B”.
3.7 CARBURATION
Carburetor setting
The role of the fuel is to cool the engine and lubricate the engine in addition to developing power. As a result, if a mixture of air and
fuel is too poor, abnormal combustion will occur and engine seizure may occur. If the mixture is too rich, the spark plugs will get wet
with oil, making it impossible to use the engine at full rpm or, in the worst case, the engine may stop.
The richness of the air-fuel mixture required for the engine will vary with atmospheric conditions of the day and therefore, the
settings of the carburetor must be properly suited to the atmospheric conditions (air pressure, humidity and temperature).
Finally, the driver has to make a test drive and check the vehicle condition (resumption of engine rpm, road surface condition) and
the spark plug colour.
It is advisable to make a note of settings, atmospheric conditions, road surface condition, lap-time, etc. so that the
memorandum can be used as a reference useful for future.
Air temperature Humidity Air pressure
(altitude)
Mixture Setting
High High Low (high) Richer Leaner
Low Low High (low) Leaner Richer
The reason for the above tendency is that the richness or leanness of a fuel mixture depends on the density of the air
(i.e. the concentration of oxygen in it).
– Higher temperature expands the air with its resultant reduced density.
– Higher humidity reduces the amount of oxygen in the air by so much of the water vapor in the same air.
– Lower atmospheric pressure (at a high altitude) reduces the density of the air.
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