11-9E
Repair manual KTM LC4
Art.-Nr
. 3.206.014 -E
TECHNICAL DATA – ENGINE 400 / 640 LC4 ‘98
Engine
400 LC4
640 LC4
Design
Liquid-cooled single cylinder 4-stroke engine with balancer shaft and electric starter
Displacement
398 ccm
624.6 ccm
Bore / Stroke
89 / 64 mm
101 / 78 mm
Ratio
10,8 : 1
11 : 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° (249/1)
Valve timing by 1 mm
IO 22° BTDC EO 60° BBDC
IO 13° BTDC EO 53° BBDC
valve clearence
IC 47° ABDC EC 4° ATDC
IC 51° ABDC EC 11° ATDC
Valve diameter
Intake: 36 mm Exhaust: 30 mm
Valve clearence cold
Intake: 0,20 mm Exhaust: 0,20 mm
0,15 mm Exhaust: 0,15 mm
Crank shaft bearing
2 cylinder roller bearing
Connecting rod 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
two Eaten-oilpumps
Engine oil quantity
appr. 2,1 liters including frame
Primary ratio
straight geared spur wheels 30 : 81 teeth
Clutch
multi disc clutch in oil bath
Transmission
5-speed claw shifted
Ignition system
contactless DC-CDI ignition with digital advanced system type KOKUSAN
Ignition timing
adjustment to max. 38° BTDC at 6000 rpm
Generator
12V 200W
Spark plug
NGK DR8EA
Spark plug gap
0,7 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
electric starter and kickstarter
for chain
5
/
8
x
1
/
4
"
15
16
17
38
40
42
45
48
for chain
5
/
8
x
1
/
4
"
30:81
Primary
ratio
Transmission
Available chain
drive sprockets
Available final
drive sprockets
GEAR RATIOS
1st gear
14:35
2nd gear 15:24
3rd gear
18:21
4th gear
20:19
5th gear
22:18
Original final
drive ratio
15:45
16:40
16:42
17:38
Summary of Contents for 400-660 LC4 1998-2005
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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 405: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 38E KTM 620 SC 2001...
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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...
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