Yamaha WR450F, Руководство по эксплуатации для владельца

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7 - 4
T U N
SETTING
Main jet adjustment
The richness of the air-fuel mixture at full throt-
tle can be set by changing the main jet
1
.
If the air-fuel mixture is too rich or too lean, the
engine power will drop, resulting in poor accel-
eration.
Effects of changing the main jet (reference)
È
Idle
É
Fully open
Standard main jet #162
1/4 1/2 3/4
+10%
#162
–10%
#172
#152
È É
Pilot jet adjustment
The richness of the air-fuel mixture with the
throttle open 1/4 or less can be set by adjust-
ing the pilot jet
1
.
Standard pilot jet #45
Effects of adjusting the pilot jet (reference)
È
Idle
É
Fully open
1/4 1/2 3/4
+5%
–5%
#48
#42
#45
È
É