Replacing The Glassfiber Yarn Packing Of The Silencer; Cleaning The Spark Arrester (Mxc/Exc Usa) - KTM 250 EXC RACING 2004 Owner's Manual

SX
C
4
450 SX
C
4
40
EXC
C
2
4
3
1
5
3
1
5
3
1
5
A
B

Replacing the glassfiber yarn packing of the silencer *

Aluminum silencers are filled with glassfiber yarn to muffle noise. The effect
of heat causes the glassfiber yarn to become loose. This may lead to a loss
of performance and reduce the silencer's muffling power. By experience,
the front glassfiber yarn packing
the rear silencing mat 2 .
For this purpose, remove the silencer from the vehicle and dismount the
3
front cap . Pull the front glassfiber yarn packing together with the inner
4
exhaust pipe out of the silencer. Clean the front inner exhaust pipe.
To facilitate the mounting procedure, you can make a mounting tool
of wood, plastic, or metal. Insert the mounting tool into the inner pipe and
mount the glassfiber packing. Push the inner pipe containing the packing
into the silencer such that the slot engages the web
object to stuff the glassfiber yarn packing all the way into the
silencer, and mount the front cap
To change the rear silencing mat, start by removing the front packing and
the inner exhaust pipe. Then, drill open the rivets and remove the end cap.
NOTE!
In every exhaust repair procedure, the O-rings must be replaced by new
ones. Glass fiber yarn packings are available from your licensed KTM
mechanic.
WARNING
T
HE EXHAUST SYSTEM BECOMES VERY HOT WHILE THE MOTORCYCLE IS RUNNING
AVOID BURNS DO NOT START WORK ON THE EXHAUST SYSTEM UNTIL IT HAS PROPERLY
.
COOLED DOWN

Cleaning the spark arrester (MXC/EXC USA) *

The spark arrester should be cleaned every time the glassfiber yarn filling is
changed or at least once annually.
For this purpose, dismount the silencer cap and remove any deposits that
B
might exist in region . Renew the O-ring and mount the silencer cap.
1 needs to be replaced more often than
A
. Use a blunt ended
C
.
5
out
.
TO