English – KTM 400 User Manual
Page 41
ENGLISH
40
BASIC CARBURETOR SETTING
Type
Keihin CR39
Keihin CR39
Keihin CR39
Keihin CR39
Keihin CR39
Keihin CR39
Carb.-setting number
031299
130799
100699
250899
250401
240401
Main jet
175
175
175
175
175
175
Jet needle
OBDTM
OBDVR
OBDTM
OBDTM
OBDVR OBDVR
Idling jet
48
48
48
48
48
48
Main air jet
200
200
200
200
200
200
Idling air jet
100
100
100
100
100
100
Needle clip position
4.th from top
3.th from top
2.th from top
3.th from top
6. th from top
3. th from top
Starting jet
85
85
85
85
85
85
Mixture control screw open
1
1,25
2,5
1
1,25
1
Throttle valve
15
15
15
15
15
15
Performance restrictor
–
slide stop24,5mm
–
–
–
–
Stop pump membrane
055
055
055
055
055
055
400 SX RACING
400 MXC/EXC RAC.
400 EXC RAC. 12 kW
520 EXC RAC. 12,5 kW
520 MXC/EXC
RACING
520 SX RACING
400 EXC-G
520 EXC-G
Type
400 SX
400 MXC
400 EXC
520 SX
520 MXC
520 EXC
Design
Liquid-cooled single cylinder 4-stroke engine with balancer shaft
Displacement
398 ccm
510 ccm
Bore/Stroke
89 / 64 mm
95 / 72 mm
Ratio
11 : 1
Fuel
unleaded premium gasoline with at least RON 95
Valve Timing
4 valves over rocker arm and 1 overhead camshaft, camshaft drive through single chain
Camshaft
0121
5521
Valve diameter Intake
35 mm
Valve diameter Exhaust
30 mm
Valve clearence cold Intake
0,10 mm
Valve clearence cold Exhaust
0,15 mm
Crank shaft bearing
2 cylinder roller bearing
Connecting rod bearing
needle bearing
Top end bearing
bronze bushing
Piston
alluminium alloy cast
alluminium alloy forged
Piston rings
1 compression ring, 1 oil scraper ring
Engine lubrication
pressure circulation lubrication with two rotorpumps
Engine oil
fullsynthetic oil (Shell Advance Ultra4 SAE 10W40)
Quantity of engine oil
1,25 liters
Primary ratio
straight geared spur wheels 33:76 t
Clutch
multi disc clutch in oil bath
Transmission claw shifted
6-speed
6-speed
6-speed
4-speed
6-speed
6-speed
Gear ratio
1
st
Gear
16:32
16:32
14:34
16:32
16:32
14:34
2
nd
Gear
18:30
18:30
17:31
18:30
18:30
17:31
3
rd
Gear
20:28
20:28
19:28
20:28
20:28
19:28
4
th
Gear
22:26
22:26
22:26
22:26
22:26
22:26
5
th
Gear
24:24
24:24
24:23
-
24:24
24:23
6
th
Gear
21:18
21:18
26:21
-
21:18
26:21
Ignition system
contactless DC-CDI ignition with digital advanced system by KOKUSAN
Generator
12V 40W
12V 110W
Spark plug
NGK CR8 EK
Spark plug gap
0,6 mm
Cooling system
liquid cooled, permanent rotation of cooling liquid through mechanic driven water pump
Cooling liquid
1 liter, 40% antifreeze, 60% water, at least -25° (-13° F)
Starting equipment
kickstarter
kick - electric starter
kickstarter
kick - electric starter
TECHNICAL DATA – ENGINE 400/520 SX, MXC, EXC RACING 2002