Troubleshooting - KTM 450 SMR Owner's Manual

TROUBLESHOOTING

Faults
The engine cannot be cranked (elec-
tric starter)
Engine turns but does not start.
Engine has no idle.
Engine does not speed up.
Possible cause
Operating error
Battery discharged
Fuse blown
Low external temperature
Starter relay defective
Starter motor defective
Operating error
Motorcycle was out of use for a long
time and there is old fuel in the float
chamber
Fuel feed interrupted
Engine flooded
Spark plug oily or wet
Electrode distance (plug gap) of spark
plug too wide
Fault in ignition system
Short-circuit cable in cable harness
frayed, short-circuit button defective
Plug connector of CDI control device,
pulse generator or ignition coil oxi-
dized.
Water in carburetor or jets blocked
Idling jet blocked
Adjusting screws on carburetor dis-
torted
Spark plug defective
Ignition system defective
Carburetor running over because float
needle dirty or worn
Loose carburetor jets
Ignition system defective
Action
–
Go through the steps of starting the engine.
( p. 15)
–
Recharge the battery. x
–
Check the charging voltage.
–
Check the closed current.
–
Check the generator.
x
–
Remove the fuse. ( p. 52)
–
Install the fuse. ( p. 52)
–
Use the battery supplied in the accessories
package.
4Ah battery (YTX5L-BS) (
–
Check the starter relay.
x
–
Check the starter motor.
x
–
Go through the steps of starting the engine.
( p. 15)
–
Empty the carburetor float chamber.
( p. 63)
–
Check the fuel tank breather.
–
Clean the fuel tap.
–
Check/set the carburetor components.
–
Clean and dry the spark plug or replace if nec-
essary.
–
Clean and dry the spark plug or replace if nec-
essary.
–
Adjust the plug gap.
Guideline
Spark plug electrode gap
0.7 mm (0.028 in)
–
Check the ignition system.
–
Check the wiring harness. (visual check).
–
Check the electrical system.
–
Clean the plug connector and treat it with con-
tact spray.
–
Check/set the carburetor components.
–
Check/set the carburetor components.
–
Carburetor - adjust the idle speed.
( p. 62)
–
Change spark plug.
–
Check the ignition coil.
x
–
Check the CDI unit.
x
–
Check the spark plug connector.
–
Check the ignition pulse generator.
–
Check the generator. x
–
Check/set the carburetor components.
–
Check/set the carburetor components.
–
Check the ignition coil.
x
–
Check the CDI unit. x
–
Check the spark plug connector.
–
Check the ignition pulse generator.
–
Check the generator.
x
67
( p. 51)
x
x
p. 75)
x
x
x
x
x
x
x
x
x
x
x
x