7 - 4
T U N
SETTING
1
Jet needle
2
Main air jet
3
Pilot air jet
4
Needle jet
5
Main jet
6
Pilot jet
7
Pilot screw
Main jet adjustment
The richness of the air-fuel mixture at full throt-
tle can be set by changing the main jet
1
.
* For EUROPE
** For CDN, ZA, AUS and NZ
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)
Å
Idle
ı
Fully open
Standard main jet
#175
* #172
** #170
1/4
1/2
3/4
+10%
#175
–10%
#185
#165
Å
ı
Summary of Contents for WR250F(P)
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