Yamaha YZ450F Owner's Service Manual page 86

CHECKING THE SILENCER AND
EXHAUST PIPE
1. Inspect:
• Gasket "1"
Damage → Replace.
CHANGING THE SILENCER FIBER
For USA and CDN
2. Remove:
• Bolt "1"
• Inner pipe "2"
Do not hit the silencer stay "a" as it
may do damage to the silencer.
Remove the inner pipe while holding
the silencer in place with a vise etc.
3. Replace:
• Fiber "1"
EXHAUST PIPE AND SILENCER
4. Install:
• Inner pipe "1"
• Bolt "2"
Bolt (silencer):
8 Nm (0.8 m•kg, 5.8
ft•lb)
• Apply heat-resistant sealant to the
areas "a" shown, making sure that
there are no gaps in the beads of
sealant.
• Take care not to allow the fiber out
of place when installing the inner
pipe.
• Apply locking agent (LOCTITE®) to
the threads of the bolts.
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.
• Do not hit the silencer stay "b" as
it may do damage to the silencer.
Remove the inner pipe while holding
the silencer in place with a vise etc.
4-5
2. Replace:
• Fiber "1"
3. Install:
• Inner pipe "1"
• Rivet (front) "2"
• Band "3"
• Apply heat-resistant sealant to the
areas "a" shown, making sure that
there are no gaps in the beads of
sealant.
• Take care not to allow the fiber out
of place when installing the inner
pipe.
• Install the band "3" with the mating
ends "b" positioned as shown.