16 TUNING THE ENGINE 92
Influence of throttle slide adjustment
1
/
4
1
/
8
1
/
2
3
/
4
0
1
1
/
4
1
/
8
1
/
2
3
/
4
0
1
K00495-01
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 greatest influ-
ence.
1
/
4
1
/
8
1
/
2
3
/
4
0
1
1
/
4
1
/
8
1
/
2
3
/
4
0
1
K00496-01
When the throttle slide is 1/4 open, the idling jet and the clip position have the greatest influence. The influence of the first cylindri-
cal 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.
1
/
4
1
/
8
1
/
2
3
/
4
0
1
1
/
4
1
/
8
1
/
2
3
/
4
0
1
K00497-01
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.
402674-01
Column 2 corresponds to a needle in the standard position.
Column 1 corresponds to a needle which is half a clip leaner.
Column 3 corresponds to a needle which is half a clip richer.
Column 4 specifies the diameter of the first cylindrical part of the needle. The smaller the diameter of the first cylindrical part of the
needle, the richer the carburation. The larger the diameter of the first cylindrical part of the needle, the leaner the carburation. The
first cylindrical part of the needle has the greatest influence in the lowest load adjustment.
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