KTM 250 EXC RACING User Manual

10-14E
BASIC CARBURATOR SETTING
Type Keihin FCR-MX 37 Keihin FCR-MX 37 Keihin FCR-MX 37 Keihin FCR-MX 39
Carburator-setting number 3700A 3700A 3700A 3900A
Main jet 160 160 160 178
Jet needle OBETP OBEKT OBEKT OBDTN
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 3. rd from top 3. rd from top 2. rd from top
Starting jet 85 85 85 85
Mixture control screw open 1.25 0.75 0.75 1.5
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 ––––
250 EXC RACING
Six Days
250 EXC RACING
11 kW
250 EXC-G
USA
450 EXC RACING
Six Days
BASIC CARBURATOR SETTING
Type Keihin FCR-MX 39 Keihin FCR-MX 39 Keihin FCR-MX 41 Keihin FCR-MX 39
Carburator-setting number 3900A 3900A 4122A 3900B
Main jet 178 178 185 178
Jet needle OBDVR OBDVR OBDTP OBDTN
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 3. rd from top 4. rd from top 2. rd from top
Starting jet 85 85 85 85
Mixture control screw open 1.25 1.25 1.0 1.5
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 –
450 EXC RACING
12 KW
525 EXC RACING
Six Days
450 EXC-G
450 MXC-G
USA
450 SX RACING
BASIC CARBURATOR SETTING
Type Keihin FCR-MX 39 Keihin FCR-MX 39 Keihin FCR-MX 41
Carburator-setting number 3900B 3900B 4125A
Main jet 178 178 185
Jet needle OBDVT OBDVT OBDTP
Idling jet 42 42 42
Main air jet 200 200 200
Idling air jet 100 100 100
Needle position 3. rd from top 3. rd from top 4. rd from top
Starting jet 85 85 85
Mixture control screw open 1.25 1.25 1.5
Slide 15 15 15
Performance restrictor Slide stop – –
Stop pump membrane 858 / 2.15 mm 858 / 2.15 mm 858 / 2.15 mm
Hot start device – – 2.5 mm
525 EXC-G
525 MXC-G
USA
525 EXC RACING
525 MXC Desert
12 kW
525 SX RACING

KTM 250 EXC RACING Specifications

General

Brand	KTM
Model	250 EXC RACING
Category	Motorcycle
Language	English