KTM 400 LS-E/MIL Owner's Manual page 42

DEFECT
Engine does not idle
Engine does not rev up
Engine does not have
enough power
Engine gets too hot
CAUSE
Idling jet is clogged
Adjusting screws on the carburetor
are turned in the wrong position
Spark plug is defective
Ignition system is defective
Fuel level is too high in the carburetor
Float needle valve leaks
Float leaks
Choke cable has no clearance, cau-
sing the cold-start system to be
constantly activated
Throttle slide diaphragm is defective
Leaks in the carburetor
Loose carburetor jets
Defective electronic ignition advance
The fuel supply is partly interrupted
or the carburetor soiled
Float leaks
Diaphragm on the throttle slide is
defective
Carburetor leaks
Air filter is heavily soiled
Valve clearance is too small
Compression loss due to incorrect
adjustment of hand decompression
lever
Electronic ignition advance
defective
Not enough cooling liquid in the
cooling system
Radiator fins are heavily soiled
Foam has formed in the cooling
system
Bent radiator hose
Defective thermometer
Fan fuse has blown
Defective thermoswitch
Defective fan
REMEDY
Disassemble the carburetor and clean the jets
Have the carburetor adjusted
Replace the spark plug
Have the ignition system checked
Disassemble the carburetor, clean and check for wear
Replace the float needle valve
Replace the float
Adjust the choke cable
Replace the diaphragm
Check the vacuum hoses and vent hoses on the carburetor for
a tight fit and kink-free installation
Tighten the jets
Have the ignition system checked
Clean and check the fuel system and the carburetor
Replace the float
Replace the diaphragm
Check the vacuum hoses and vent hoses on the carburetor for
a tight fit and kink-free installation
Clean or replace the air filter, visit an authorized workshop
Have the valve clearance adjusted
Adjust the hand decompression cable
is Have the ignition system checked
Add cooling liquid (see maintenance work), check the cooling
system for tightness
Clean the radiator fins with a water jet
Replace the cooling liquid, use brand-name antifreeze
Shorten or replace the radiator hose
Dismount the thermostat and have it checked (opening tem-
perature 70°C). Visit a workshop
Replace the fuse and check the fan for proper functioning (see
below)
Visit a workshop
Check the fan for proper functioning. To check, start the
engine and short-circuit the terminals on the thermoswitch
(lower right radiator). Visit a workshop
41