ENGLISH
50
TROUBLE SHOOTING
»
TROUBLE
CAUSE
REMEDY
Engine does not rev high
Carburetor fuel level too high because
Float needle is dirty or worn out
Float leaks
Loose carburettor jets
Electronic ignition timing faulty
Dismount carburetor and check if worn out
Replace float needle
Replace float
Tighten jets
Have ignition system checked
Engine will not reach full power Fuel supply partically interrupted or carbu-
retor dirty
Float leaks
Air filter very dirty
Valve clearance to small
Loss of compression because hand decom-
pressor has no play
Electronic ignition timing faulty
Clean and check fuel system as well as carburetor
Replace the float
Clean or replace air filter, contact a KTM dealer
Have valve clearance adjusted
Check setting of the hand decompression cable
Have ignition system checked
Engine overheats
Insufficient cooling liquid
Radiator fins are extremely dirty
Foam forms in cooling system
Bent radiator hose
Thermostat defective
Blown fan fuse (SMC)
Defect thermoswitch (SMC)
Fan defective (SMC)
Refill cooling liquid (see maintenace work), check cool-
ing system for leaks
Clean radiator with water jet
Replace cooling liquid, use antifreezer with brand name
Shorten or replace cooling hose
Remove and check thermostat (opening temperature
70°C (158°F) or replace it, contact a KTM dealer
Replace fuse and check if fan operates properly (see
below)
Contact a KTM dealer
Check if fan operates properly. To do this, start the
engine, then bypass the connections to the thermoswitch
(bottom right radiator), contact a KTM dealer
High oil consumption
Buckling gear ventilation hose
Engine oil level too high
Engine oil too thin (viscosity)
Readjust or replace ventilation hose
Check engine oil level when the engine is warm; correct
if necessary
Use thicker engine oil; see chapter „Engine oil“
Headlight and parking light fail Blown fuse
SXC: Replace fuse (5)
SMC: Replace fuse (4)
Flasher lights, brake light and
horn fail
Blown fuse
SXC: Replace fuse (4)
SMC: Replace fuse (3)
The battery is discharged
The ignition (power consumer) hasn’t been
switched off
The battery isn’t charged by the generator
because
Recharge the battery according to the relevant instruc-
tions.
Remove seat and check voltage regulator connections;
voltage regulator and generator should be checked by a
KTM dealer.
