Yamaha WR250F 2008 Owner's And Service Manual page 90

CARBURETOR SETTING PARTS
Main jet Size
Rich #182
#180
#178
#175
#172
(STD) #170
#168
#165
#162
* (STD) #160
Lean #158
Pilot jet Size
Rich #50
#48
* (STD) #45
(STD) #42
Lean #40
Jet needle Size
Rich GDEPN
GDEPP
GDEPQ
GDEPR
GDEPS
GDEPT
GDEPU
Lean GDEPV
Leak jet Size
Rich #60
(STD) #70
#80
#90
#100
#110
Lean #120
* For EUROPE
Part
number
(-14943-)
4MX-94
4MX-43
4MX-93
4MX-42
4MX-92
4MX-41
4MX-91
4MX-40
4MX-90
4MX-39
4MX-89
Part
number
(-14948-)
4MX-07
4MX-06
4MX-05
4MX-04
4MX-03
Part
number
(-14916-)
5UM-BN
5UM-BP
5UM-B1
5UM-BR
5UM-BS
5UM-BT
5UM-BU
5UM-BV
Part
number
(-1494F-)
4JT-11
4JT-15
4JT-19
4JT-23
4JT-27
4JT-29
4JT-31
4-3
ENGINE