Yamaha TZ250M1 Owner's Service Manual page 272

SETTING
EC71Q020
Carburetor setting parts
Part name
Main jet 1 1
Lean #350
* Rich
Pilot jet 2 2
Lean
* Rich
Main nozzle ∆
Lean
∆
3 3
∆
∆
* Rich
Jet needle 4 4 *
Power jet 5 5
Lean
* Rich
NOTE:
• The parts marked ∆ are not supplied togeth-
er. There are available on order as YAMAHA
genuine parts.
• Use a #500 main jet when selecting a next
smaller size jet than a #540.
7-8
TUN
Size Part number
137-14143-70
#360 137-14143-72
#370 137-14143-74
#380 137-14143-76
#390 137-14143-78
#400 137-14143-80
#410 137-14143-82
#420 137-14143-84
#430 137-14143-86
#440 137-14143-88
#450 137-14143-90
#460 137-14143-92
#470 137-14143-94
#480 137-14143-96
#490 137-14143-98
#500 137-1414K-00
#540 137-1414K-08
#560 137-1414K-12
#580 137-1414K-16
#20 4KM-14142-20
#25 4KM-14142-25
#30 4KM-14142-30
R-6 3TC-14141-R6
R-7 3TC-14141-R7
R-8 3TC-14141-R8
R-9 3TC-14141-R9
S-0 3TC-14141-S0
S-1 3TC-14141-S1
S-2 3TC-14141-S2
S-3 3TC-14141-S3
S-4 3TC-14141-S4
6EGJ4-63 3JD-14116-E2
#50 830-14231-10
#55 830-14231-11