Repair manual KTM LC4
Art.-Nr
. 3.206.014 -E
9-4E
TROUBLE
Engine will not start
Engine will not idle
CAUSE
Operating error
The motorcycle has been out of
operation for a longer period of
time. Therefore the float chamber
is filled with old fuel.
Fuel supply interrupted
Flooded engine
Sooty or wet spark plug
Electrode gap too large
Spark plug connector or spark plug
faulty
If connector oxidates from
generator to ignition coil
Short circuit cable scored in wiring
harness, ignition lock, emergency
OFF switch faulty
Water in short emergency OFF
switch
Water in carburetor or jets blocked
Carburetor does not fit in properly
at intake flange
Idling jet blocked
Adjusting screws on carburetor
uncorrect adjusted
Spark plug faulty
Ignition system faulty
REMEDY
Switch on ignition, switch on emergency OFF switch, open
fuel tap, tank fuel, do not use choke i.e. the hotstart device.
Pay attention to starting off information (see driving
instructions).
The easily inflammable components of the new fuels
evaporate during longer periods of standstill. When the
motorcycle has been out of operation for more than a week,
it is therefore recommended to drain the old fuel from the
float chamber. The engine will immediately start off when the
float chamber is filled with new fuel.
Close fuel tap, loosen fuel hose at carburetor, lead into a
basin and open fuel tap,
– if fuel leaks out, clean carburetor
– if no fuel leaks out, check tank ventilation, i.e. clean fuel
tap
Fully open the throttle when starting or replace the spark
plug, respectively.
Clean / dry or replace spark plug.
Adjust spark plug electrode gap to 0,7 mm
Dismount spark plug, connect ignition cable, hold to ground
(blank place on engine) and actuate kickstarter, a strong
spark must be produced at the spark plug
– If no spark is created exchange the spark plug.
– If the new spark plug doesn’t produce a spark either,
disconnect the spark plug connector from the ignition
cable, hold it approx. 5 mm from ground and start.
– If a spark now occurs, replace spark plug cap
– If no spark is produced, control ignition system
Remove fuel tank, clean connector and treat with contact
spray
Remove fuel tank, draw off blue/black cable from orange
cable of ignition coil and check spark.
– If a spark is produced, seek fault in short circuit current
Remove 2-pole connector located underneath the headlight
mask, treat emergency OFF switch with contact spray
Dismount and clean carburetor
Check if carburetor is fitted in correctly
Dismount carburetor and clean jets
Adjust carburetor
Exchange the spark plug
Check ignition system
TROUBLE SHOOTING – LC4 COMPETITION
Summary of Contents for 400-660 LC4 1998-2005
Page 2: ......
Page 3: ...REPAIRMANUAL1998 2005 400 660 LC4 KTM Group Partner...
Page 4: ......
Page 6: ......
Page 8: ......
Page 10: ......
Page 12: ......
Page 14: ......
Page 16: ......
Page 32: ......
Page 34: ......
Page 42: ......
Page 86: ......
Page 88: ......
Page 110: ......
Page 112: ......
Page 114: ......
Page 154: ...1 2 5 s g s g 3 6 7 43E...
Page 156: ...7 8 9 s g s g 3 7 45E...
Page 158: ...1 2 3 4 5 7 47E...
Page 160: ...6 9 10 11 7 49E...
Page 164: ......
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...
Page 214: ......
Page 216: ......
Page 226: ......
Page 236: ......
Page 314: ......
Page 324: ......
Page 364: ......
Page 370: ...13 3E...
Page 371: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 4E...
Page 372: ...13 5E...
Page 373: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 6E...
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...
Page 381: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 14E...
Page 382: ...13 15E...
Page 383: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 16E...
Page 384: ...13 17E...
Page 385: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 18E...
Page 386: ...13 19E...
Page 387: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 20E...
Page 388: ...13 21E...
Page 389: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 22E...
Page 390: ...13 23E...
Page 391: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 24E...
Page 392: ...13 25E...
Page 393: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 26E...
Page 394: ...13 27E...
Page 395: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 28E...
Page 396: ...13 29E...
Page 397: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 30E...
Page 398: ...13 31E...
Page 399: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 32E...
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...
Page 409: ...Repair manual KTM LC4 Art Nr 3 206 014 E 13 42E...
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...
Page 428: ...13 61E...
Page 429: ...13 62E Repair manual KTM LC4 Art Nr 3 206 014 E...