11-16E
Engine
400 LC4
620 LC4
Design
Liquid-cooled single cylinder 4-stroke engine with balancer shaft
Displacement
398 ccm
609 ccm
Bore / Stroke
89 / 64 mm
101 / 76 mm
Ratio
10,8 : 1
10,4 : 1
Fuel
unleaded premium gasoline with a 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 15° BTDC EO 52° BBDC
valve clearance
IC 42° ABDC EC 4° ATDC
IC 54° ABDC EC 17° 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
Crank shaft bearing
2 cylinder roller bearing
Conrod bearing
needle bearing
Top end bearing
bronze bushing
Piston
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
1,6 liters (0,42 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 KOKUSAN
Ignition timing
adjustment to max. 40 ° BTDC at 5000 rpm
adjustment to max. 36 ° BTDC at 5000 rpm
Generator
12V 110W
Spark plug
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 400/620 Supercompetition ‘99
Carburetor
Carburetor setting number
Main jet
Needle jet
Idling jet
Jet needle
Needle position from top
Mixture.adj. screw open
Throttle valve
Starting jet
Performance restrictor
PHM 38 SD
300896
150
DR 266
45
K 51
3 rd
1,5 turn
40
45
slide stop 22 mm
PHM 38 SD
4894/6
190
DR 270 (DR 272)
45
K 51
2 nd
1,5 turn
40
45
–
PHM 40 SD
110996
155
DR 268
45
K 51
3 rd
1,5 turn
40
45
slide stop 26 mm
PHM 40 SD
4922
195
DR 272
45
K 51
2 nd
1,5 turn
40
45
–
400 SC (20 kW)
400 SC
620 SC (20 kW)
620 SC
BASIC CARBURETOR SETTING
Summary of Contents for 400-660 LC4 1998-2005
Page 2: ......
Page 3: ...REPAIRMANUAL1998 2005 400 660 LC4 KTM Group Partner...
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Page 158: ...1 2 3 4 5 7 47E...
Page 160: ...6 9 10 11 7 49E...
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Page 166: ......
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...
Page 372: ...13 5E...
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Page 374: ...13 7E...
Page 375: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 8E...
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 382: ...13 15E...
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Page 395: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 28E...
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Page 397: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 30E...
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Page 400: ...13 33E...
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...
Page 406: ...13 39E...
Page 407: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 40E...
Page 408: ...13 41E...
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Page 410: ...13 43E...
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...
Page 426: ...13 59E...
Page 427: ...13 60E Repair manual KTM LC4 Art Nr 3 206 014 E...
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