11-5E
Repair manual KTM LC4
Art.-Nr
. 3.206.014 -E
Engine
400 LC4
620 LC4
Design
Liquid-cooled single cylinder 4-stroke engine with balancer shaft
Displacement
398 cm
3
609 cm
3
Bore / Stroke
89 / 64 mm
101 / 76 mm
Ratio
10,8 : 1
SX: 11,5 : 1 SC: 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° (249)
Valve timing by 1 mm
IO 22° BTDC EO 59° BBDC
IO 14° BTDC EO 56° BBDC
valve clearence
IC 47° ABDC EC 10° ATDC
IC 55° ABDC EC 13° ATDC
Valve diameter
Intake: 36 mm Exhaust: 30 mm
Valve clearence cold
Intake: 0,20 mm Exhaust: 0,20 mm
Intake: 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
forced-feed lubrication through Eaton-Oilpump with oil sump
Engine oil quantity
1,40 liters
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
adjustment to max. 38 ° BTDC at 6000 rpm
SX: adjustment to max. 38 ° BTDC at 6000 rpm
SC: adjustment to max. 32 ° BTDC at 6000 rpm
Generator
12V 130W
Spark plug
NGK D8EA
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 ° C (–13 ° F)
Starting equipment
decompressor automatic and hand actuated, cold and hot start knob on carburetor
TECHNICAL SPECIFICATIONS – ENGINE 400/620 SX, SC ‘98
BASIC CARBURETOR SETTING
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
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
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 SX
620 SC
Содержание 400-660 LC4 1998-2005
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