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Diameter of straight
portion
Clip position
Rich
1 richer
0.5 richer
STD
0.5 leaner
Lean
1 leaner
6CHY5-78
6CHY5-79
6CHY5-80
6CHY6-79
6CHY5-79
Rich
ø2.780 mm (0.1094 in)
6CHY5-78-4th groove
6CHY6-78-3rd groove
6CHY5-78-3rd groove
6CHY6-78-2nd groove
6CHY5-78-2nd groove
7-6
SETTING
EC719071
Jet needle adjustment
(For USA, CDN, ZA, AUS and NZ)
On the carburetors used in the YZ125, the main
nozzle is a non disassembly type, so it can not
be
replaced.
Therefore,
requires the change of the jet needle.
1. The jet needle setting parts, having the same
taper angle, are available in different straight
portion diameters and in different taper start-
ing positions.
Standard jet needle
<Example>
6CHY5-79
Diameter of straight portion
Clip position
Taper angle
Changing from 6CHY5-79 to 6CHY6-79 has
the same effect as a raise of 0.5 clip posi-
tion.
A Difference in straight portion dia.
B Difference in clip position
a 0.5 richer
b Reference needle
ø2.790 mm (0.1098 in)
6CHY5-79-4th groove
6CHY6-79-3rd groove
6CHY5-79-3rd groove
6CHY6-79-2nd groove
6CHY5-79-2nd groove
TUN
carburetor
setting
6CHY5-79
Lean
ø2.800 mm (0.1102 in)
6CHY5-80-4th groove
6CHY6-80-3rd groove
6CHY5-80-3rd groove
6CHY6-80-2nd groove
6CHY5-80-2nd groove
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