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T U N
Jet needle adjustment
The jet needle is adjusted by changing it.
The tapered sections of all jet needles have
the same starting positions, but the needles
are available with different straight-portion
diameters.
Standard jet needle
OBEKP
<Example>
OBEKP - 4
Clip position
Diameter
a
of straight portion
Effects of changing the jet needle (refer-
ence)
(Diameter of the straight portion)
Changing the diameter of the straight portion
adjusts the air-fuel mixture when the throttle is
1/8 to 1/4 open.
Å
Idle
ı
Fully open
+10 %
P
–10 %
N
Q
1/4
1/2
3/4
ı
Å
SETTING
