Yamaha WR250F(Y) 2009, Owner'S Service Manual

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