Yamaha 2008 YZ250F Fahrer- Und Wartungshandbuch Seite 181

2. When rough engine operation is
felt in quick throttle opening, se-
lect a leak jet having higher cali-
brating No. than standard to lean
out the mixture. <Example> #70
→
#80
Standard leak jet
CARBURETOR SETTING PARTS
Main jet
Rich
#70
(STD)
Lean
Pilot jet
Rich
(STD)
Lean
Jet needle
Rich NFPN 5TA-14916-PN
(STD) NFPR 5TA-14916-PR
Lean NFPU 5TA-14916-PU
Rich NFLN 5TA-14916-LN
Lean NFLU 5TA-14916-LU
Leak jet
Rich
(STD)
Lean
Size Part number
#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
Size Part number
#48 4MX-14948-06
#45 4MX-14948-05
#42 4MX-14948-04
#40 4MX-14948-03
#38 4MX-14948-02
Size Part number
NFPP 5TA-14916-PP
NFPQ 5TA-14916-P1
NFPS 5TA-14916-PS
NFPT 5TA-14916-PT
NFLP 5TA-14916-LP
NFLQ 5TA-14916-L1
NFLR 5TA-14916-LR
NFLS 5TA-14916-LS
NFLT 5TA-14916-LT
Size Part number
#40 4JT-1494F-03
#50 4JT-1494F-07
#60 4JT-1494F-11
#70 4JT-1494F-15
#80 4JT-1494F-19
#90 4JT-1494F-23
#100 4JT-1494F-27
7-3
ENGINE