KTM 450 SX-F 2019 User Manual

TROUBLESHOOTING 20
135
Faults Possible cause Action
Malfunction indicator lamp
lights up or flashes
Error in the electronic fuel
injection
– Check the wiring for damage and the
electrical plug-in connections for corro-
sion and damage.
– Read out the fault memory using the
KTM diagnostics tool.
High oil consumption Engine vent hose bent – Route the vent hose without bends or
change it if necessary.
Engine oil level too high – Check the engine oil level. ( p. 125)
Engine oil too thin (low viscos-
ity)
– Change the engine oil and oil filter,
clean the oil screens. ( p. 126)
Piston or cylinder worn – Measure the piston/cylinder mounting
clearance.
12 V battery discharged 12 V battery is not charging – Check the charging voltage.
– Check the stator winding of the alter-
nator.
Unwanted power consumer – Check the open-circuit current.

KTM 450 SX-F 2019 Specifications

General

Engine Type	Single cylinder, 4-stroke
Displacement	449.9 cc
Bore x Stroke	95 mm x 63.4 mm
Starter	Electric starter
Transmission	5-speed
Fuel System	Keihin EFI, 44 mm throttle body
Cooling	Liquid cooled
Ground Clearance	370 mm
Compression Ratio	12.75:1
Ignition	Keihin EMS
Rear Suspension	WP Shock with Linkage
Front Brake	Single Disc
Rear Brake	Single Disc
Fuel Tank Capacity	7 liters
Seat Height	950 mm
Final Drive	Chain
Front Brake Caliper	Brembo