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21 TROUBLESHOOTING
Faults
The engine cannot be cranked
(starter motor)
The engine turns but does not
start
Engine does not speed up
Engine has too little power
144
Possible cause
Operating error
12-V battery discharged
Main fuse blown
Starter relay defective
Starter motor defective
Operating error
Quick release coupling not
joined
Fuse 1 blown
Fuse 4 blown
Idle speed is not set correctly
Spark plug sooty or wet
Plug gap of spark plug too wide
Ignition system defective
Short-circuit cable in wiring
harness frayed, stop button or
emergency OFF switch faulty
Error in the electronic fuel
injection
Error in the electronic fuel
injection
Ignition system defective
Air filter heavily contaminated
Fuel filter is very dirty
Fuel screen is very dirty
Error in the electronic fuel
injection
Exhaust system leaky,
deformed or too little glass
fiber yarn filling in the main
silencer
Valve clearance too little
Action
–
Carry out start procedure. (
–
Charge the 12-V battery.
–
Check the charging voltage.
–
Check the open-circuit current.
–
Check the stator winding of the alter-
nator.
–
Change the main fuse. (
–
Check the starter relay.
–
Check the starter motor.
–
Carry out start procedure. (
–
Join quick release coupling.
–
Change the fuses of individual electri-
cal power consumers.
–
Change the fuses of individual electri-
cal power consumers.
–
Adjust the idle speed.
–
Clean and dry the spark plug and spark
plug connector, or change if necessary.
–
Adjust plug gap.
Guideline
Spark plug electrode gap
1.0 mm (0.039 in)
–
Check the ignition system.
–
Check the wiring harness. (visual
check)
–
Check the electrical system.
–
Read out the fault memory using the
KTM diagnostics tool.
–
Read out the fault memory using the
KTM diagnostics tool.
–
Ignition coil - check the secondary
winding.
–
Check the spark plug connector.
–
Check the stator winding of the alter-
nator.
–
Clean the air filter and air filter box.
(
p. 75)
–
Change the fuel filter.
–
Change the fuel screen.
–
Read out the fault memory using the
KTM diagnostics tool.
–
Check exhaust system for damage.
–
Change the glass fiber yarn filling in
the main silencer.
(
–
Adjust the valve clearance.
p. 41)
(
p. 115)
p. 118)
p. 41)
(
p. 132)
(
p. 135)
p. 79)
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