KTM 450 SX-F 2018 User Manual

10 TUNING THE CHASSIS 35
10.13 Adjusting the fork air pressure
Warning
Danger of accident Modifications to the suspension setting may seriously alter the handling characteristic.
Extreme modifications to the suspension setting may cause a serious deterioration in the handling characteristic and overload
components.
– Only make adjustments within the recommended range.
– Ride slowly to start with after making adjustments to get the feel of the new handling characteristic.
Info
Check or adjust the air pressure under the same conditions at the earliest 5 minutes after switching off the engine.
The air suspension is located in the left fork leg. The pressure and rebound damping is located in the right fork leg.
Preparatory work
– Raise the motorcycle with a lift stand. ( p. 39)
S01204-10
Main work
–
Remove protection cap
1
.
–
Push fork pump
2
together fully.
Fork pump (79412966000)
Info
The fork pump is included as part of the motorcycle's separate enclosure.
– Connect the fork pump to the left fork leg.
The fork pump indicator switches on automatically.
A little air escapes from the fork leg when connecting.
Info
This is due to the volume of the hose and not due to a defect in the fork
pump or the fork.
Read the accompanying KTM PowerParts instructions.
– Adjust the air pressure as specified.
Guideline
Air pressure (SX‑F EU) 10.8 bar (157 psi)
Air pressure (SX‑F US) 10.8 bar (157 psi)
Air pressure (XC‑F US) 9.8 bar (142 psi)
Gradual changing of the air pressure in
steps of
0.2 bar (3 psi)
Minimum air pressure 7 bar (102 psi)
Maximum air pressure 15 bar (218 psi)
Info
Never set the air pressure to a value outside the stated range.
– Disconnect the fork pump from the left fork leg.
When disconnecting, excess pressure will escape from the hose – the fork leg
itself does not lose any air.
The fork pump indicator switches off automatically after 80 seconds.
– Mount the protection cap.
Finishing work
– Remove the motorcycle from the lift stand. ( p. 39)

KTM 450 SX-F 2018 Specifications

General

Engine Type	Single cylinder, 4-stroke
Displacement	449.9 cc
Bore x Stroke	95 mm x 63.4 mm
Compression Ratio	12.75:1
Starter	Electric starter
Transmission	5-speed
Fuel System	Keihin EFI, 44 mm throttle body
Cooling	Liquid cooled
Seat Height	960 mm
Ground Clearance	370 mm
Fuel Tank Capacity	7 liters
Ignition	Keihin EMS
Primary Drive	26:72
Subframe	Aluminum
Suspension Travel Front	310 mm
Suspension Travel Rear	300 mm
Front Wheel	1.60 x 21"
Rear Wheel	2.15 x 19"
Front Tire	80/100-21"
Rear Tire	110/90-19"
Chain	5/8 x 1/4"
Steering Head Angle	63.9°
Wheelbase	1, 485 mm
Frame	Central-tube frame made of chrome molybdenum steel
Front Suspension	WP USD Xplor 48
Rear Suspension	WP Shock Absorber with Linkage
Front Brake	260 mm Disc Brake
Rear Brake	220 mm Disc Brake
Clutch	Wet multi-disc clutch, Brembo hydraulics
Handlebar	Aluminum, Tapered Ø 28/22 mm
Final Drive	Chain