11-14E
Carburetor
Carburetor setting number
Main jet
Needle jet
Idling jet
Jet needle
Needle position from top
Mixture.adju. screw open
Throttle valve
Starting jet
Performance restrictor
Pump jet
PHM 38 ND
120198
150 (155)
AB 265
52 (50)
K 11
I
1,5 turn
50/1
45
–
33 (38)
PHM 38 ND
120198
150 (155)
AB 265
52 (50)
K 11
I
1,5 turn
50/1
45
slide stop 48mm
33 (38)
VHSB 38 QS
081297
185
FN 260 (FN 258)
33
K 35 (K 32)
II
1,5 turn
50
40
–
–
VHSB 38 QS
091297
140 (185)
FN 260 (FN 258)
33
K 35 (K32)
II
1,5 turn
50
40
slide stop 36mm
–
PHM 40 SD
4922
195
DR 272
45
K 51
II
1,5 turn
40
45
–
–
400 SXC
400 SC (20 kW)
540 SXC
540 SXC (20 kW)
620 SX
Engine
400 SXC
540 SXC
620 SX
Design
Liquid-cooled single cylinder 4-stroke engine
Displacement
398 ccm
538,5 ccm
609 ccm
Bore / Stroke
89 / 64 mm
101 / 76 mm
Ratio
10,8 : 1
11,3 : 1
11,5 : 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
249/1
Valve timing by 1 mm
IO 22° BTDC EO 60° BBDC
IO 13° BTDC EO 53° BBDC
valve clearance
IC 42° ABDC EC 4° ATDC
IC 51° ABDC EC 11° ATDC
Valve diameter
Intake: 36 mm Exhaust: 30 mm
Valve clearance cold
Intake: 0,20 mm Exhaust: 0,20 mm
Intake: 0,15 mm Exhaust: 0,15 mm
Crankshaft bearing
2 cylinder roller bearing
Conrod bearing
needle bearing
Top end bearing
bronze bushing
Piston
forged/cast aluminium alloy
Piston rings
1 compression ring, 1 taper face ring, 1 oil scraper ring
Engine lubrication
forced-feed lubrication through 2 Eaten-oilpumps
Engine oil quantity
1,45 liters (0,38 US gallons)
Primary ratio
straight geared spur wheels 30 : 81 teeth
Clutch
multi disc clutch in oil bath
Transmission
5-speed claw shifted
Gear ratio
1st
14:35
2nd
15:24
3rd
18:21
4th
20:19
5th
22:18
Ignition system
contactless thyristor ignition with electronic advanced system type SEM
Ignition timing
400 SXC/620 SX: adjustment to max. 38 ° BTDC at 6000 rpm
540 SXC: adjustment to max. 32 ° BTDC at 6000 rpm
Generator
12V 130W
Spark plug
NGK D8EA NGK DPR8 EA-9
Spark plug gap
0,90 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°C (–13°F)
Starting equipment
decompressor automatic and hand actuated, cold and hot start knob on carburetor
TECHNICAL SPECIFICATIONS – ENGINE 400/540 SXC, 620 SX ‘99
BASIC CARBURETOR SETTING
Summary of Contents for 400-660 LC4 1998-2005
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Page 3: ...REPAIRMANUAL1998 2005 400 660 LC4 KTM Group Partner...
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Page 160: ...6 9 10 11 7 49E...
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Page 167: ...Repair manual KTM LC4 Art Nr 3 206 014 E 8 3E CARBURETOR MIKUNI BST 40...
Page 175: ...Repair manual KTM LC4 Art Nr 3 206 014 E 8 11E CARBURETOR DELL ORTO PHM 40 SD...
Page 179: ...Repair manual KTM LC4 Art Nr 3 206 014 E 8 15E CARBURETOR DELL ORTO PHM 38 ND...
Page 184: ...8 20E CARBURETOR DELL ORTO VHSB 38 QS...
Page 191: ...Repair manual KTM LC4 Art Nr 3 206 014 E 8 27E CARBURATOR KEIHIN FCR 41...
Page 203: ...8 39E Repair manual KTM LC4 Art Nr 3 206 014 E CARBURETOR KEIHIN FCR MX 41...
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Page 370: ...13 3E...
Page 371: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 4E...
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Page 376: ...13 9E...
Page 377: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 10E KTM 400 640 SC 1998...
Page 378: ...13 11E...
Page 379: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 12E...
Page 380: ...13 13E...
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Page 401: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 34E...
Page 402: ...13 35E 400 640 LC4 USA...
Page 403: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 36E 400 640 LC4 USA 2000...
Page 404: ...13 37E...
Page 405: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 38E KTM 620 SC 2001...
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Page 411: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 44E...
Page 412: ...13 45E...
Page 413: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 46E KTM 640 LC4 E 2001...
Page 414: ...13 47E 625 SuperComp 2002 SERVICE...
Page 415: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 48E KTM 625 SUPER COMPETITION 2002...
Page 416: ...13 49E SERVICE 640 LC4 ADVENTURE...
Page 417: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 50E KTM 640 LC4 ADVENTURE 2002...
Page 418: ...13 51E SERVICE DUKE 2002...
Page 419: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 52E KTM DUKE 2002...
Page 424: ...13 57E 660 SMC 2003...
Page 425: ...13 58E Repair manual KTM LC4 Art Nr 3 206 014 E KTM 660 SMC 2003...
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