TROUBLESHOOTING 21
151
Faults Possible cause Action
The engine cannot be cranked
(starter motor)
Operating error – Carry out start procedure. ( p. 43)
12-V battery discharged –
Charge the 12-V battery. ( p. 121)
– Check charging voltage.
– Check the open-circuit current.
– Check the stator winding of the alter-
nator.
Main fuse blown – Change the main fuse. ( p. 123)
Starter relay defective – Check the starter relay.
Starter motor defective – Check the starter motor.
The engine turns but does not
start
Operating error – Carry out start procedure. ( p. 43)
Quick release coupling not
joined
– Join the quick release coupling.
Fuse 1 blown – Change the fuses of individual electri-
cal power consumers. ( p. 124)
Fuse 4 blown – Change the fuses of individual electri-
cal power consumers. ( p. 124)
Idle speed is not set correctly – Adjust the idle speed. ( p. 139)
Spark plug sooty or wet – Clean and dry the spark plug and spark
plug connector, or change if necessary.
Plug gap of spark plug too wide – Adjust plug gap.
Guideline
Spark plug electrode gap
1.0 mm (0.039 in)
Ignition system defective – Check the ignition system.
Short-circuit cable in wiring
harness frayed, stop button or
emergency OFF switch faulty
– 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.
Ignition system defective – Ignition coil - check the secondary
winding.
– Check the spark plug connector.
– Check the stator winding of the alter-
nator.
Engine has too little power Air filter heavily contaminated – Clean the air filter and air filter box.
( p. 80)
Fuel filter is very dirty – Change the fuel filter.
Fuel screen is very dirty – Change the fuel screen. ( p. 142)
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 the main
silencer
– Check exhaust system for damage.
– Change the glass fiber yarn filling of
the main silencer. ( p. 84)
Valve clearance too little – Adjust the valve clearance.
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