KTM 450 SX-F 2019 User Manual

TUNING THE CHASSIS 10
47
Guideline
Spring rate (SX‑F EU)
Weight of rider: 65 …
75 kg (143 … 165 lb.)
39 N/mm (223 lb/in)
Weight of rider: 75 …
85 kg (165 … 187 lb.)
42 N/mm (240 lb/in)
Weight of rider: 85 …
95 kg (187 … 209 lb.)
45 N/mm (257 lb/in)
Spring rate (SX‑F US)
Weight of rider: 65 …
75 kg (143 … 165 lb.)
42 N/mm (240 lb/in)
Weight of rider: 75 …
85 kg (165 … 187 lb.)
45 N/mm (257 lb/in)
Weight of rider: 85 …
95 kg (187 … 209 lb.)
48 N/mm (274 lb/in)
Spring rate (XC‑F US)
Weight of rider: 65 …
75 kg (143 … 165 lb.)
42 N/mm (240 lb/in)
Weight of rider: 75 …
85 kg (165 … 187 lb.)
45 N/mm (257 lb/in)
Weight of rider: 85 …
95 kg (187 … 209 lb.)
48 N/mm (274 lb/in)
Spring rate (HERLINGS REPLICA)
Weight of rider: 65 …
75 kg (143 … 165 lb.)
36 N/mm (206 lb/in)
Weight of rider: 75 …
85 kg (165 … 187 lb.)
39 N/mm (223 lb/in)
Weight of rider: 85 …
95 kg (187 … 209 lb.)
42 N/mm (240 lb/in)
Spring rate (FACTORY EDITION)
Weight of rider: 65 …
75 kg (143 … 165 lb.)
42 N/mm (240 lb/in)
Weight of rider: 75 …
85 kg (165 … 187 lb.)
45 N/mm (257 lb/in)
Weight of rider: 85 …
95 kg (187 … 209 lb.)
48 N/mm (274 lb/in)
Info
The spring rate is shown on the outside of the spring.
Finishing work
– Install the shock absorber. ( p. 67)
– Check the free travel of the foot brake lever. ( p. 96)
– Check the static sag of the shock absorber. ( p. 44)
– Check the riding sag of the shock absorber. ( p. 45)
– Adjust the rebound damping of the shock absorber. ( p. 42)
– Remove the motorcycle from the lift stand. ( p. 53)

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