20 TROUBLESHOOTING
134
Faults Possible cause Action
The engine does not turn when
the starter button is pressed
Operating error – Carry out the start procedure.
( p. 29)
12 V battery discharged – Charge the 12 V battery. ( p. 110)
– Check the charging voltage.
– Check the open-circuit current.
– Check the stator winding of the alter-
nator.
Main fuse blown – Change the main fuse. ( p. 111)
Starter relay defective – Check the starter relay.
Starter motor defective – Check the starter motor.
Engine turns but does not start The plug-in connection of the
fuel hose connection is not
connected
– Connect the plug-in connection of the
fuel line.
Fuel screen in the fuel hose
connection is clogged
– Change the fuel screen. ( p. 124)
Idle speed is not set correctly – Adjust the idle speed. ( p. 121)
Spark plug oily or wet – Clean and dry the spark plug, or
change it if necessary.
Electrode distance (plug gap)
of spark plug too wide
– Adjust the plug gap.
Guideline
Spark plug electrode gap
0.8 mm (0.031 in)
Short circuit cable in wiring
harness frayed, kill switch
defective
– Check the wiring harness. (visual
check)
– Check the electrical system.
Error in the electronic fuel
injection
– Read out the fault memory using the
KTM diagnostics tool.
Engine does not speed up Error in the electronic fuel
injection
– Read out the fault memory using the
KTM diagnostics tool.
Engine has too little power Air filter is very dirty – Clean the air filter and air filter box.
( p. 72)
Fuel filter is very dirty – Change the fuel filter.
Error in the electronic fuel
injection
– Read out the fault memory using the
KTM diagnostics tool.
Exhaust system leaky,
deformed or too little glass
fiber yarn filling in main
silencer
– Check exhaust system for damage.
– Change the glass fiber yarn filling of
the main silencer. ( p. 75)
Valve clearance too little – Adjust the valve clearance.
Engine dies during the trip Lack of fuel – Refuel. ( p. 34)
Engine overheats Too little coolant in cooling sys-
tem
– Check the cooling system for leakage.
– Check the coolant level. ( p. 114)
Too little air stream – Switch off the engine when standing.
Radiator fins very dirty – Clean radiator fins.
Foam formation in cooling sys-
tem
– Drain the coolant. ( p. 114)
– Refill with coolant. ( p. 115)
Bent radiator hose –
Change the radiator hose.
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