Yamaha YZ250(P)/LC Owner's Service Manual page 542

SETTING
EC71Q000
Carburetor setting parts
Part name
1 1
Main jet
(STD)
*(STD)
Pilot jet 2 2
*(STD)
(STD)
Jet needle 3 3
(STD)
*Jet needle 3 3
(STD)
Power jet 4 4
(STD)
*For EUROPE
7-9
TUN
Size Part number
Rich #190 4MX-14943-45
#188 4MX-14943-95
#185 4MX-14943-44
#182 4MX-14943-94
#180 4MX-14943-43
#178 4MX-14943-93
#175 4MX-14943-42
#172 4MX-14943-92
#170 4MX-14943-41
#168 4MX-14943-91
#165 4MX-14943-40
Lean #162 4MX-14943-90
Rich #62 4MX-14948-12
#60 4MX-14948-11
#58 4MX-14948-10
#55 4MX-14948-09
#52 4MX-14948-08
#50 4MX-14948-07
#48 4MX-14948-06
#45 4MX-14948-05
#42 4MX-14948-04
#40 4MX-14948-03
Lean #38 4MX-14948-02
Rich N8RW 4SR-14916-RW
N3EW 4SR-14916-EW
N8RJ 4SR-14916-RJ
N3EJ 4SR-14916-EJ
N3CJ 4SR-14916-CJ
N3EK 4SR-14916-EK
Lean N3CK 4SR-14916-CK
Rich N3EH 4SR-14916-EH
N3CH 4SR-14916-CH
N3EW 4SR-14916-EW
N3CW 4SR-14916-CW
N89W 4JT-14916-9W
N3CJ 4SR-14916-CJ
Lean N89J 4JT-14916-9J
Rich #65 4JT-1494F-13
#60 4JT-1494F-11
#55 4JT-1494F-09
#50 4JT-1494F-07
Lean #40 4JT-1494F-03