English, Technical data - engine – KTM MXC User Manual
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53
TECHNICAL DATA - ENGINE
»
BASIC CARBURATOR SETTING
250 EXC RACING
EU / AUS
11 kW
400 EXC RACING
EU / AUS
12 kW
400 EXC-G RACING USA 450 EXC RACING
EU / AUS
12 kW
Type
Keihin FCR-MX 3700A Keihin FCR-MX 3900C Keihin FCR-MX 3900C Keihin FCR-MX 3900A
Main jet
160
178
178
178
Jet needle
OBEKT
OBDVR
OBDVR
OBDVR
Idling jet
42
42
42
42
Main air jet
200
200
200
200
Idling air jet
100
100
100
100
Needle position
3
rd
from top
1
st
from top
1
st
from top
3
rd
from top
Starting jet
85
85
85
85
Mixture control screw open
0,75
1,25
1,25
1,25
Slide
15
15
15
15
Performance restrictor
Slide stop
Slide stop
–
Slide stop
Stop pump membrane
858 / 2,15 mm
858 / 2,15 mm
858 / 2,15 mm
858 / 2,15 mm
Hot start device
–
–
–
–
BASIC CARBURATOR SETTING
450 EXC-G / MXC-G
RACING USA
450 EXC RACING
SIXDAYS
450 SX RACING
525 EXC / MXC
RACING / DESERT RACING
EU / AUS 12 kW
Type
Keihin FCR-MX 3900A Keihin FCR-MX 3900A Keihin FCR-MX 4122A Keihin FCR-MX 3900B
Main jet
178
178
185
178
Jet needle
OBDVR
OBDTR
OBDTP
OBDVT
Idling jet
42
42
40
42
Main air jet
200
200
200
200
Idling air jet
100
100
100
100
Needle position
3
rd
from top
4
th
from top
4
th
from top
3
rd
from top
Starting jet
85
85
85
85
Mixture control screw open
1,25
2,0
1,0
1,25
Slide
15
15
15
15
Performance restrictor
–
–
–
Slide stop
Stop pump membrane
858 / 2,15 mm
858 / 2,15 mm
858 / 2,15 mm
858 / 2,15 mm
Hot start device
–
–
2,2 mm
–
BASIC CARBURATOR SETTING
525 MXC-G / EXC-G
RACING USA
525 EXC RACING
SIXDAYS
525 SX RACING
Type
Keihin FCR-MX 3900B Keihin FCR-MX 3900B Keihin FCR-MX 4125A
Main jet
178
178
185
Jet needle
OBDVT
OBDTR
OBDTP
Idling jet
42
42
42
Main air jet
200
200
200
Idling air jet
100
100
100
Needle position
3
rd
from top
5
th
from top
4
th
from top
Starting jet
85
85
85
Mixture control screw open
1,25
2,0
1,5
Slide
15
15
15
Performance restrictor
–
–
–
Stop pump membrane
858 / 2,15 mm
858 / 2,15 mm
858 / 2,15 mm
Hot start device
–
–
2,5 mm