KTM 450 SX-F 2017, Owner'S Manual, Page: 57 / 125

11 SERVICE WORK ON THE CHASSIS
55
11.30 Installing the main silencer
S01238-11
(All SX
‑
F standard models, XC
‑
F US)
–
Position the main silencer.
–
Mount screws
1
but do not tighten yet.
–
Attach spring 2 .
Spring hook (50305017000)
–
Tighten screws
1
.
Guideline
Remaining screws, chassis M6 10 Nm
(7.4 lbf ft)
S01635-11
(SX
‑
F Factory Edition)
–
Position the main silencer.
–
Mount screws 1 but do not tighten yet.
–
Attach spring
2
.
Spring hook (50305017000)
–
Tighten screws 1 .
Guideline
Remaining screws, chassis M6 10 Nm
(7.4 lbf ft)
11.31 Changing the glass fiber yarn filling of the main silencer
Warning
Danger of burns The exhaust system gets very hot when the vehicle is driven.
–
Allow the exhaust system to cool down before performing any work on the vehicle.
Info
Over time, the fibers of the glass fiber yarn escape and the damper "burns" out.
Not only is the noise level higher, the performance characteristic changes.
Preparatory work
–
Remove the main silencer. ( p. 54)
311691-10
Main work
(All SX
‑
F standard models, XC
‑
F US)
–
Remove all the screws on the main silencer.
–
Take off silencer cap
1
and O-ring
2
.
–
Take off outer tube 3 and O-ring 4 .
–
Pull glass fiber yarn filling
5
off of inner tube
6
.
–
Clean the parts that need to be reinstalled and check for damage.
–
Mount new glass fiber yarn filling
5
on inner tube
6
.
–
Slide O-ring
4
and outer tube
3
over glass fiber yarn filling
5
.
–
Insert O-ring
2
and silencer cap
1
into outer tube
3
.
–
Mount and tighten all of the screws.
Guideline
Screws on the main silencer M5 7 Nm (5.2 lbf ft)