Repair manual KTM LC4 Art.-Nr. 3.206.014 -E
11-3E
Engine 400 LC4 540 LC4
Design Liquid-cooled single cylinder 4-stroke engine with and without balancer shaft
Displacement 398 cm
3
538,5 cm
3
Bore / Stroke 89 / 64 mm 95 / 76 mm
Ratio 10,8 : 1 11,1 : 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 42° 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 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 two Eaton-Oilpumps with oil sump
Engine oil quantity 1,40liters
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 : 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
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 400/540 SXC ‘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 ND
120198
140
AB 265
50
K 32
II
1,5 turn
50/1
45
–
PHM 38 ND
120198
140
AB 265
50
K 32
II
1,5 turn
50/1
45
slide stop 56mm
VHSB 38 QS
081297
185
FN 260
33
K 32
II
1,5 turn
50
40
–
400 SXC 400 SXC (20 kW) 540 SXC
VHSB 38 QS
091297
140 (185)
FN 260
33
K 32
II
1,5 turn
50
40
slide stop 36mm
540 SXC (20 kW)
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