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KTM 400 EXC Racing Manual

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TECHNICAL DATA – ENGINE »
BASIC CARBURATOR SETTING
250 EXC RACING
EU
400 EXC RACING
EU
400 EXC-G RACING
USA
450 EXC RACING
EU
Type
Keihin FCR-MX 3700B Keihin FCR-MX 3900D Keihin FCR-MX 3900D Keihin FCR-MX 3900E
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 / XC-G
RACING
USA
450 EXC RACING
SIXDAYS
EU
450 SX RACING 525 EXC /
XC
RACING DESERT
EU
Type
Keihin FCR-MX 3900E Keihin FCR-MX 3900E Keihin FCR-MX 4122B Keihin FCR-MX 3900F
Main jet 178 182 185 178
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 1,5 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 XC-G / EXC-G
RACING
USA
525 EXC RACING
SIXDAYS
EU
525 SX RACING
Type
Keihin FCR-MX 3900F Keihin FCR-MX 3900F Keihin FCR-MX 4125C
Main jet 178 182 185
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
… 58 …


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