Yamaha YZ426F(M)/LC Owner's Service Manual page 576

SETTING
EC71Q000
Carburetor setting parts
Part name
Main jet Rich
(STD)
Lean
Pilot jet Rich
(STD)
Lean
Jet needle Rich
*(STD)
(STD)
Lean
* Except for USA
7 - 8
T U N
Size Part number
#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
#160 4MX-14943-39
#158 4MX-14943-89
#155 4MX-14943-38
#152 4MX-14943-88
#50 4MX-14948-07
#48 4MX-14948-06
#45 4MX-14948-05
#42 4MX-14948-04
#40 4MX-14948-03
#38 4MX-14948-02
#35 4MX-14948-01
#DKN
5JG-14916-DN
#DKP 5JG-14916-DP
#DKQ 5JG-14916-D1
#DKR 5JG-14916-DR
#DKS 5JG-14916-DS
#DKT
5JG-14916-DT
#DKU 5JG-14916-DU
#EKN 5JG-14916-EN
#EKP 5JG-14916-EP
#EKQ 5JG-14916-E1
#EKR 5JG-14916-ER
#EKS 5JG-14916-ES
#EKT 5JG-14916-ET
#EKU 5JG-14916-EU
#FKN 5JG-14916-FN
#FKP 5JG-14916-FP
#FKQ 5JG-14916-F1
#FKR 5JG-14916-FR
#FKS 5JG-14916-FS
#FKT 5JG-14916-FT
#FKU 5JG-14916-FU