Technical data – engine, English – KTM 250 XC-F User Manual
Page 58
TECHNICAL DATA – ENGINE
»
57
ENGLISH
57
BASIC CARBURATOR SETTING
400 XC-W
USA
400 EXC RACING
EU
Type
Keihin FCR-MX 3900D Keihin FCR-MX 3900E
Main jet
178
178
Jet needle
OBDVR
OBDVR
Idling jet
42
42
Main air jet
200
200
Idling air jet
100
100
Needle position
1st from top
1st from top
Starting jet
85
85
Mixture control screw open
1.25
1.25
Slide
15
15
Performance restrictor
–
Slide stop
Stop pump membrane
858 / 2.15 mm
858 / 2.15 mm
BASIC CARBURATOR SETTING
450 XC, XC-W
USA
450 EXC RACING
EU / AUS
450 EXC RACING
SIXDAYS
EU
Type
Keihin FCR-MX 3900E Keihin FCR-MX 3900E Keihin FCR-MX 3900E
Main jet
178
178
182
Jet needle
OBDVR
OBDVR
OBDTR
Idling jet
42
42
42
Main air jet
200
200
200
Idling air jet
100
100
100
Needle position
3rd from top
3rd from top
4th from top
Starting jet
85
85
85
Mixture control screw open
1.25
1.25
2.0
Slide
15
15
15
Performance restrictor
–
Slide stop
–
Stop pump membrane
858 / 2.15 mm
858 / 2.15 mm
858 / 2.15 mm
BASIC CARBURATOR SETTING
525 XC, XC-W
USA
525 EXC RACING EU
525 EXC RACING AUS
525 XC DESERT RACING EU
525 EXC RACING
SIXDAYS
EU
Type
Keihin FCR-MX 3900F Keihin FCR-MX 3900F Keihin FCR-MX 3900F
Main jet
178
178
182
Jet needle
OBDVT
OBDVT
OBDTR
Idling jet
42
42
42
Main air jet
200
200
200
Idling air jet
100
100
100
Needle position
3rd from top
3rd from top
5th from top
Starting jet
85
85
85
Mixture control screw open
1.25
1.25
2.0
Slide
15
15
15
Performance restrictor
–
Slide stop
–
Stop pump membrane
858 / 2.15 mm
858 / 2.15 mm
858 / 2.15 mm