KTM 50 SX MINI 2010, Owner'S Manual

Page: 24 / 85

MAINTENANCE WORK ON CHASSIS AND ENGINE
22
700506-01
–
Measure the full spring length while it is under tension and note down the value.
–
Loosen lock ring

.
–
Turn adjusting ring

until the spring is no longer under tension.
Hook wrench (T106S)
–
Measure the overall spring length when not under tension.
–
Tighten the spring by turning adjusting ring

to measurement.
Guideline
Spring preload (50 SX)
Standard 3 mm (0.12 in)
Spring preload (50 SX Mini)
Standard 5 mm (0.2 in)
Info
Measure is the difference between the relaxed spring length and the ten-
sioned spring length.
Depending on the static sag and/or the riding sag, it may be necessary to
increase or decrease the spring preload.
–
Tighten lock ring

.
–
Install shock absorber.
x
( p. 23)
9.8
Adjusting the riding sag
x
–
Remove shock absorber.
x
( p. 22)
–
After removing the shock absorber, clean it thoroughly.
–
Choose and mount a suitable spring.
Guideline
Spring rate (50 SX)
Weight of rider: < 25 kg (< 55 lb.) 30 N/mm (171 lb/in)
Weight of rider: 25… 35 kg (55… 77 lb.) 35 N/mm (200 lb/in)
Weight of rider: > 40 kg (> 88 lb.) 40 N/mm (228 lb/in)
Spring rate (50 SX Mini)
Weight of rider: < 25 kg (< 55 lb.) 65 N/mm (371 lb/in)
Weight of rider: 25… 35 kg (55… 77 lb.) 75 N/mm (428 lb/in)
Weight of rider: > 35 kg (> 77 lb.) 85 N/mm (485 lb/in)
Info
The spring rate is shown on the outside of the spring.
Smaller weight differences can be compensated by changing the spring preload.
–
Install shock absorber.
x
( p. 23)
–
Check the static sag of the shock absorber. ( p. 21)
–
Check the riding sag of the shock absorber. ( p. 21)
–
Adjust the rebound damping of the shock absorber. ( p. 20)
9.9
Removing the shock absorber
x
–
Jack up the motorcycle. ( p. 20)
700477-01
–
Remove screw

and lower the rear wheel with the swing arm as far as possible
without blocking the rear wheel. Fix the rear wheel in this position.
–
Remove screw

, push splash protector

to the side, and remove the shock
absorber.