TECHNICAL
DATA
-
CARBURETOR
199
all
400
models
I
Carburetor type KEIHIN
FCR-MX
39
Carburetor identification number
3900N
Needle
position
5th position from top
Idle mixture adjusting screw
Open
0.75
turn
Pump diaphragm stop
2.15
mm
(0.0846
in)
Main jet
180
Jet needle
OBOYU
(OBOTQ)
Idling jet
42
Idle air jet
100
Cold
start jet
65
(85)
Spill jet
40
Slide stop present
450
EXC
EUfAUS,
450
EXC
SIX
DAYS
I
Carburetor type KEIHIN
FCR-MX
39
Carburetor
identification
number
39001
Needle position 4th position from top
Idle
mixture
adjusting
screw
Open
1.75
turns
Pump diaphragm stop
2.15
mm
(0.0846
in)
Main jet
180
Jet needle
OBOYU
(OBOTaJ
Idling jet
40
Idle air jet
100
Cold
start jet
65
(85)
Spill jet
40
Slide stop present
450EXC
USA
I
Carburetor type
KEIHIN
FCR-MX
39
Carburetor
identification
number
3900Z
Needle position 4th position from top
Idle mixture adjusting screw
Open
1.75
turns
Pump membrane stop
2.15
mm
(0.0846
in)
Main jet
180
Jet needle
OBOYU
Idling jet
48
Idle air jet
100
Cold
start jet
85
Leakage
nozzle
40
TECHNICAL
DATA
-
CARBURETOR
199
all
400
models
I
Carburetor type KEIHIN
FCR-MX
39
Carburetor identification number
3900N
Needle
position
5th position from top
Idle mixture adjusting screw
Open
0.75
turn
Pump diaphragm stop
2.15
mm
(0.0846
in)
Main jet
180
Jet needle
OBOYU
(OBOTQ)
Idling jet
42
Idle air jet
100
Cold
start jet
65
(85)
Spill jet
40
Slide stop present
450
EXC
EUfAUS,
450
EXC
SIX
DAYS
I
Carburetor type KEIHIN
FCR-MX
39
Carburetor
identification
number
39001
Needle position 4th position from top
Idle
mixture
adjusting
screw
Open
1.75
turns
Pump diaphragm stop
2.15
mm
(0.0846
in)
Main jet
180
Jet needle
OBOYU
(OBOTaJ
Idling jet
40
Idle air jet
100
Cold
start jet
65
(85)
Spill jet
40
Slide stop present
450EXC
USA
I
Carburetor type
KEIHIN
FCR-MX
39
Carburetor
identification
number
3900Z
Needle position 4th position from top
Idle mixture adjusting screw
Open
1.75
turns
Pump membrane stop
2.15
mm
(0.0846
in)
Main jet
180
Jet needle
OBOYU
Idling jet
48
Idle air jet
100
Cold
start jet
85
Leakage
nozzle
40