KTM 50 SX 2019 User Manual

TROUBLESHOOTING 20
115
Faults Possible cause Action
Engine turns but does not start Operating error – Carry out the start procedure.
( p. 23)
Motorcycle was out of use for a
long time and there is old fuel
in the float chamber
– Empty the carburetor float chamber.
Fuel supply interrupted – Check the fuel tank breather.
– Clean the fuel tap.
(50 SX)
– Check/set the carburetor compo-
nents.
(50 SX Mini)
– Check/set the carburetor compo-
nents.
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
0.60 mm (0.0236 in)
Fault in ignition system – Check the ignition system.
Short circuit cable in wiring
harness frayed, kill switch
defective
– Check the kill switch.
The connector or ignition coil is
loose or oxidized
– Clean the plug-in connection and treat
it with contact spray.
Water in carburetor or jets
blocked
(50 SX)
– Check/set the carburetor compo-
nents.
(50 SX Mini)
– Check/set the carburetor compo-
nents.
Engine has no idle Idling jet blocked
(50 SX)
– Check/set the carburetor compo-
nents.
(50 SX Mini)
– Check/set the carburetor compo-
nents.
Adjusting screws on the carbu-
retor are in turned to the wrong
position
(50 SX)
– Carburetor - adjust the idle
speed. ( p. 95)
(50 SX Mini)
– Carburetor – adjust the idle
speed. ( p. 96)
Spark plug defective – Change spark plug.
Ignition system defective – Check the ignition coil.
– Check the spark plug connector.

KTM 50 SX 2019 Specifications

General

Brand	KTM
Model	50 SX 2019
Category	Motorcycle
Language	English