Yamaha YZ250F(D), Owner'S Service Manual, Page: 79 / 198

4-5
EXHAUST PIPE AND SILENCER
CHECKING THE SILENCER AND
EXHAUST PIPE
1. Inspect:
• Gasket "1"
Damage
→
Replace.
CHANGING THE SILENCER FIBER
For USA and CDN
1. Remove:
• Rivet "1"
• Inner pipe "2"
• Silencer end cap "3"
Take care not to damage the rivet
fitting holes (ø4.9 mm) "a" in re-
moval.
Pull out the inner pipe while lightly
tapping the stay "b" on the silencer
using a soft hammer.
2. Replace:
• Fiber "1"
• Fiber "2"
• Fiber "3"
Install the fiber 2 to the inner pipe.
Then, after wrapping the fiber 1, as is
vinyl packaged, around fiber 2, se-
cure them using the tape "a".
3. Replace:
• Fiber (silencer end cap)"1"
The edges of the holes "b" in the
partition plate may cause an injury,
so take care not to directly touch it.
• Make cut "a" as shown using scis-
sors and the like.
• Using a stick or the like, stuff the fi-
ber in order of increasing size into
the end cap of the silencer through
hole "b" in the partition plate.
4. Install:
• Inner pipe "1"
• Rivet (front) "2"
• Apply heat resistant sealant along
the plate edge "a" on the inside of
the silencer and also along the si-
lencer edge "b" as shown.
• Take care not to allow the fiber out
of place when installing the inner
pipe.
5. Install:
• Silencer end cap "1"
• Rivet (rear) "2"
Apply heat resistant sealant along the
plate edge "a" on the inside of the si-
lencer and also along the silencer
edge "b" as shown.
Except for USA and CDN
1. Remove:
• Rivet (front) "1"
• Inner pipe "2"
Take care not to damage the rivet
fitting holes (ø4.9 mm) "a" in re-
moval.
Pull out the inner pipe while lightly
tapping the stay "b" on the silencer
using a soft hammer.
2. Replace:
• Fiber "1"
• Fiber "2"
• Fiber "3"
Install the fiber 2 to the inner pipe.
Then, after wrapping the fiber 1, as is
vinyl packaged, around fiber 2, se-
cure them using the tape "a".