KTM MXC - Manual (Page 50)

ENGLISH
49
TROUBLESHOOTING
»
TROUBLE CAUSE REMEDY
Engine doesn’t crank (E-starter). Operating errror
Blown fuse
Discharged battery.
Low outside temperature
Turn on the emergency-OFF switch (Australia only)
Dismount the left paneling and the filter box cover and
replace the fuse in the starter relay.
Recharge the battery and investigate the causes for
discharging; contact a KTM dealer.
Start the engine with the kickstarter
Engine cranks but doesn’t start (E-
starter).
Engine will not start (Kickstarter).
Operating error
The motorcycle has been out of opera-
tion for a longer period of time. Therefore
old fuel has accumulated in the float
chamber
Fuel supply interrupted
Flooded engine
Sooty or wet spark plug
Electrode gap too large
Spark plug connector or spark plug
faulty
Short circuit cable scored in wiring har-
ness, emergency OFF switch or short cir-
cuit button faulty
The plug connection of the CDI-unit, the
pulse generator or the ignition coil has
oxydized
Water in carburetor or jets blocked
Open fuel tap, tank fuel, actuate choke. Pay attention to
starting information (see driving instructions).
The easily inflammable components of the new fuels evap-
orate during longer periods of standing still.
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 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, the carburetor may need cleaning
– if no fuel leaks out, check tank ventilation, i.e. clean
fuel tap
In order to "pump the engine free", pull the hand decompres-
sion lever, fully rev up the engine, actuate the kickstarter 5
to 10 times or actuate the E-starter 2 times for 5 seconds
each. Then, start the engine as described above.
If the engine fails to start, unscrew the spark plug and dry it.
Clean and dry the spark plug or exchange it, respectively
Adjust spark plug electrode gap to 0.6 mm
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 replace 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 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
Dismount the fuel tank, disconnect the black/yellow cable
from the cable of the emergency-OFF switch and the short-
circuit button, respectively, and check the ignition spark.
If a spark is generated, look for the problem in the short-
circuit circuit.
Remove the seat and the fuel tank. Clean the plug con-
nection and treat it with contact spray
Dismount and clean the carburetor
Engine fails to idle Glogged idling jet
Incorrect adjustment of adjusting
screws on carburetor
Defective spark plug
Defective ignition system
Disassemble the carburetor and clean the jets
Have the carburetor adjusted
Replace the spark plug
Have the ignition system checked
If you had the specified maintenance work on your motorcycle carried out, disturbances can hardly be expected. Should an error occur
nevertheless, we advise you to use the troubleshooting chart in order to find the cause of error.
We would like to point out that many operations cannot be performed by yourself. In case of uncertainty, please contact a KTM-dealer.