Yamaha YZ250T1 Owner's Service Manual page 254

SETTING
EC71Q000
Carburetor setting parts
Part name
Main jet 1
Rich
*(STD)
(STD)
Lean
Pilot jet 2
Rich
*(STD)
(STD)
Lean
Jet needle 3
Rich N8RW 4SR-14916-RW
(STD)
Lean N3CK
*Jet needle 3
Rich N8RH
(STD)
Lean N3CJ
Power jet 4
Rich
(STD)
Lean
*For EUROPE
7-9
TUN
Size Part number
#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
#162 4MX-14943-90
#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
#38 4MX-14948-02
N3EW 4SR-14916-EW
N8RJ 4SR-14916-RJ
N3EJ 4SR-14916-EJ
N3CJ 4SR-14916-CJ
N3EK 4SR-14916-EK
4SR-14916-CK
4SR-14916-RH
N3EH 4SR-14916-EH
N8RW 4SR-14916-RW
N3EW 4SR-14916-EW
N3CW 4SR-14916-CW
N3EJ 4SR-14916-EJ
4SR-14916-CJ
#65 4JT-1494F-13
#60 4JT-1494F-11
#55 4JT-1494F-09
#50 4JT-1494F-07
#40 4JT-1494F-03