GAS GAS MC 125 2022 Owner's Manual page 99

Idling jet IJ
The idling jet has the greatest influence in the low to mid throttle slide range.
If the engine stutters at idle speed or when accelerating with a partially open throttle slide, a smaller idling jet must be
used. If the engine knocks in this power range, then a larger idling jet must be used.
Idle air adjusting screw open ASO
The idle air adjusting screw has the greatest influence at idle speed.
Influence of throttle slide adjustment
The idling jet has the greatest influence when the throttle slide is closed. The first cylindrical part of the needle and the clip
position have only minimal influence.
When the throttle slide is 1/8 open, the first cylindrical part of the needle, the idling jet and the clip position have the great-
est influence.
When the throttle slide is 1/4 open, the idling jet and the clip position have the greatest influence. The influence of the first
cylindrical part of the needle is less.
When the throttle slide is 1/2 open, the position of the needle has the greatest influence. The influence of the main jet and
the idling jet is only minimal.
When the throttle slide is 3/4 open, the influence of the main jet is greatest. The clip position and the idling jet have only
minimal influence.
When the throttle slide is fully open, the influence of the main jet is greatest. The clip position and the idling jet have only
minimal influence.
Needle overview
The jet needles available are shown in the following table.
TUNING THE ENGINE 15
K00495-01
K00496-01
K00497-01
97