Yamaha YZ450F(B) 2012, Owner'S Service Manual

Page: 85 / 228

4-4
EXHAUST PIPE AND SILENCER
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.
• 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.
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.
INSTALLING THE SILENCER AND
EXHAUST PIPE
1. Install:
• Gasket
• Exhaust pipe "1"
• Nut (exhaust pipe) "2"
First temporarily tighten both nuts to 7
Nm (0.7 m•kg, 5.1 ft•lb). Then retight-
en the same nut to 10 Nm (1.0 m•kg,
7.2 ft•lb).
2. Install:
• Silencer clamp (front)
• Exhaust pipe 2 "1"
• Bolt (exhaust pipe 2) "2"
Install and temporarily tighten the ex-
haust pipe 2 with its end positioned
as shown with respect to the exhaust
pipe 1.
3. Install:
• Silencer clamp (rear)
• Silencer "1"
• Bolt (silencer) "2"
Install and temporarily tighten the si-
lencer so that its joint is positioned as
shown with respect to the exhaust
pipe 2.
4. Install:
• Bolt (exhaust pipe 2):
• Silencer clamp (front):
• Silencer clamp (rear):
Tighten while checking that their front
and rear joints are inserted in posi-
tion.
Nut (exhaust pipe):
10 Nm (1.0 m•kg, 7.2
ft•lb)
Bolt (silencer):
30 Nm (3.0 m•kg, 22
ft•lb)
Bolt (exhaust pipe 2):
20 Nm (2.0 m•kg, 14
ft•lb)
Silencer clamp (front):
12 Nm (1.2 m•kg, 8.7
ft•lb)
Silencer clamp (rear):
16 Nm (1.6 m•kg, 11
ft•lb)
3 - 7 mm (0.12 - 0.28 in)
1 - 9 mm (0.04 - 0.35 in)