KTM 150 SX - Page 40

10 TUNING THE CHASSIS 38
B00292-10
Main work
– Choose and mount a suitable spring.
Guideline
Spring rate (125/150 SX 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 (125/150 SX US)
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 (250 SX EU)
Weight of rider: 65… 75 kg (143…
165 lb.)
51 N/mm (291 lb/in)
Weight of rider: 75… 85 kg (165…
187 lb.)
54 N/mm (308 lb/in)
Weight of rider: 85… 95 kg (187…
209 lb.)
57 N/mm (325 lb/in)
Spring rate (250 SX US)
Weight of rider: 65… 75 kg (143…
165 lb.)
51 N/mm (291 lb/in)
Weight of rider: 75… 85 kg (165…
187 lb.)
54 N/mm (308 lb/in)
Weight of rider: 85… 95 kg (187…
209 lb.)
57 N/mm (325 lb/in)
Spring rate (All XC models)
Weight of rider: 65… 75 kg (143…
165 lb.)
51 N/mm (291 lb/in)
Weight of rider: 75… 85 kg (165…
187 lb.)
54 N/mm (308 lb/in)
Weight of rider: 85… 95 kg (187…
209 lb.)
57 N/mm (325 lb/in)
Info
The spring rate is shown on the outside of the spring.
Finishing work
– Install the shock absorber. ( p. 54)
– Install the main silencer. ( p. 62)
– Remove the motorcycle from the lift stand. ( p. 44)
– Check the static sag of the shock absorber. ( p. 35)
– Check the riding sag of the shock absorber. ( p. 36)
– Adjust the rebound damping of the shock absorber. ( p. 33)