Checking The Silencer And Exhaust Pipe; Changing The Silencer Fiber; Installing The Silencer And Exhaust Pipe - Yamaha YZ450F(X) Owner's Service Manual

CHECKING THE SILENCER AND
EXHAUST PIPE
1. Inspect:
• Gasket "1"
→
Damage Replace.

CHANGING THE SILENCER FIBER

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" (for EUROPE)
3. Replace:
• Fiber "1" (except for EUROPE)
Wrap around the inner pipe the fiber
as is vinyl packaged, then secure it
with pieces of tape "2".
EXHAUST PIPE AND SILENCER
4. Install:
• Inner pipe "1"
• Rivet (front) "2"
• Band "3"
• 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.
• Install the band "3" with the mating
ends "c" positioned as shown.
INSTALLING THE SILENCER AND
EXHAUST PIPE
1. Install:
• Gasket
• Exhaust pipe "1"
• Nut (exhaust pipe) "2"
Nut (exhaust pipe):
20 Nm (2.0 m•kg, 14
ft•lb)
• Bolt (exhaust pipe) "3"
Bolt (exhaust pipe):
20 Nm (2.0 m•kg, 14
ft•lb)
4-4
First, temporarily tighten the nut (ex-
haust pipe), then tighten the bolt (ex-
haust pipe) 13 Nm (1.3 m•kg, 9.4
ft•lb). After that, retighten the nut (ex-
haust pipe) 20 Nm (2.0 m•kg, 14 ft•lb)
and then the bolt (exhaust pipe) 20
Nm (2.0 m•kg, 14 ft•lb).
2. Install:
• Silencer clamp "1"
Silencer clamp:
14 Nm (1.4 m•kg, 10
ft•lb)
• Gasket "2"
• Silencer "3"
• Washer "4"
• Bolt (silencer) "5"
Bolt (silencer):
30 Nm (3.0 m•kg, 22
ft•lb)
• Install the gasket with its meshed
area "a" toward the exhaust pipe
side.
• The gasket should be installed ac-
cording to the dimension shown.
New