SETTING
Relationship with throttle opening
The flow of the fuel through the carburetor
main system is controlled by the main jet and
then, it is further regulated by the area
between the main nozzle and the jet needle.
The fuel flow relates to the diameter of the
straight portion of the jet needle with the throt-
tle 1/8 to 1/4 open and relates to the clip posi-
tion with the throttle 1/8 to 3/4 open.
Therefore, the fuel flow is balanced at each
stage of throttle opening by the combination of
the jet needle straight portion diameter, and
clip position.
Carburetor setting parts
Part name
Main jet
Rich
(STD)
Lean
Pilot jet
Rich
(STD)
Lean
Jet needle
Rich
Lean
Leak jet
Rich
(STD)
Lean
7 - 7
T U N
Size
Part number
#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
#50
4MX-14948-07
#48
4MX-14948-06
#45
4MX-14948-05
#42
4MX-14948-04
#40
4MX-14948-03
#DUP
5TJ-14916-9P
#DUQ
5TJ-14916-91
#DUR
5TJ-14916-9R
#DUS
5TJ-14916-9S
#DUT
5TJ-14916-9T
#DUU
5TJ-14916-9U
#DUV
5TJ-14916-9V
#35
4JT-1494F-01
#40
4JT-1494F-03
#45
4JT-1494F-05
#50
4JT-1494F-07
#55
4JT-1494F-09
#60
4JT-1494F-11
#65
4JT-1494F-13