KTM LC4 ADVENTURE R 640 2000 Owner's Handbook Manual page 35

TROUBLE
Engine cranks but doesn't
start.
Engine fails to idle
Engine does not rev high
Engine will not reach full
power
CAUSE
Spark plug connector or spark plug
faulty
The plug connection of the CDI-
unit, the pulse generator or the
ignition coil has oxydized
Water in carburetor or jets blocked
Carburetor does not fit in properly
at intake flange
Glogged idling jet
Oncorrect adjustment of adjusting
screws on carburetor
Defective spark plug
Defective ignition system
Carburetor fuel level too high
because
Float needle is dirty or worn out
Float leaks
The cold starting system is perma-
nently activated due to a lack of
play in the choke cable.
Defective membrane of slide
Carburetor leaking
Loose carburettor jets
Electronic ignition timing faulty
Fuel supply partically interrupted or
carburetor dirty
Float leaks
Defective membrane of slide
Carburetor leaking
Air filter very dirty
Valve clearance to small
Loss of compression because hand
decompressor has no play
Electronic ignition timing faulty
REMEDY
Dismount spark plug, connect ignition cable, hold to ground
(blank place on engine) and actuate starter, 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, dis-
connect the spark plug connector from the ignition cable,
hold it a distance of 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 the seat, the right side cover and the fuel tank. Clean
the plug connection and treat it with contact spray
Dismount and clean carburetor
Check if carburetor is fitted in correctly
Disassemble carburetor and clean jets
Have carburetor adjusted
Replace spark plug
Have ignition system checked
Dismount carburetor and check if worn out
Replace float needle
Replace float
Adjust choke cable.
Replace membrane
Check vacuum hose and venting hose of carburetor for cor-
rect position (no kinks)
Tighten jets
Have ignition system checked
Clean and check fuel system as well as carburetor
Have fuel pump checked.
Replace the float
Replace membrane
Check vacuum hose and venting hose of carburetor for cor-
rect position (no kinks)
Clean or replace air filter, contact a KTM dealer
Have valve clearance adjusted
Check setting of the hand decompression cable
Have ignition system checked
33