KTM 450 SMR - Manual (Page 68)

TROUBLESHOOTING
66
 7528%/(6+227,1*
Faults Possible cause Measure
The engine cannot be cranked (electric
starter). Battery discharged ಥ Recharge the battery. ( P. 51)
ಥ Check the cause of discharging.
Fuse blown ಥ Remove the fuse. ( P. 52)
ಥ Replace the fuse. ( P. 52)
Low external temperature ಥ Use the battery supplied in the acces-
sories package.
4Ah battery
‘(YTX5L-BS) ( P. 74)
Engine turns but does not start. Operating error ಥ Carry out the instructions for starting.
( P. 15)
Motorcycle was out of use for a long time
and there is old fuel in the float chamber ಥ Empty the carburetor float chamber.
( P. 62)
Fuel feed interrupted ಥ Check tank vent.
ಥ Clean fuel tap.
ಥ Clean carburetor.
Engine flooded ಥ Clean and dry spark plug or replace if
necessary.
Spark plug oily or wet ಥ Clean and dry spark plug or replace if
necessary.
Electrode distance (plug gap) of spark
plug too wide ಥ Adjust plug gap.
Specification
spark plug electrode gap
0.7
‘mm (0.03‘in)
Spark plug connector or spark plug defec-
tive
Warning
Risk of injury ಗThe ignition
system is under high voltage.
ಥ Do not touch parts of the ig-
nition system. Have work on
the ignition system carried
out in an authorized KTM
workshop.
ಥ Remove spark plug, connect ignition
cable, hold spark plug to ground (bare
metal area on engine), and try to start
the engine.
Specification
You should see a strong spark on the
spark plug.
ಥ If there is no spark, change the spark
plug.
ಥ If there is still no spark, remove the
spark plug cap from the ignition cable,
hold it at the specified distance from
the ground contact, and try to start the
engine.
Specification
5
‘mm (0.2‘in)
ಥ If you now have a spark, replace the
spark plug connector.
ಥ If there is no spark, have the ignition
system checked.
Short-circuit cable in wiring harness
chafed, short-circuit button defective ಥ Check wiring harness. (visual check)
ಥ Check electrical system.
Socket connector of CDI control device,
pulse generator or ignition coil oxidized. ಥ Clean socket connector and treat it
with contact spray.
Water in carburetor or jets blocked ಥ Clean carburetor.
Engine has no idle. Idling jet blocked ಥ Clean carburetor.
Adjusting screws on carburetor distorted ಥ Have the carburetor adjusted.
Spark plug defective ಥ Change spark plug.