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86
Fig. 4. 53
CD
Exhaust pipe joint
®
6 mm lock washer
®
Exhaust pipe joint
nut
©
Exhaust pipe
®
Cylinder
head
®
Exhaust pipe gasket
®
Exhaust pipe joint collar
Fig. 4. 54
CD
®
nstalling
the exhaust pipe
Exhaust pipe ioint nut
Exhaust pipe
4
FRAME
(
......
) Arrow marks indicates gas flow
Fig.
4.
52
Internal
construction
of
muffler
CD
Expansion chamber
®
Silen cer
5.
Install the exhaust muffler and the step bar.
Upon completion of the above, adjust the stop
switch and the rear
brake.
4. 9
Exhaust Pipe and Muffler
A.
Construction
The
exhaust
pipe transmits exhaust gas from the
cylinder head to the muffler.
Pipe should have
minimum of bends as this will restrict flow of the
gas
which will reduce the power output.
On the
450 exhaust pipe is constructed of double walled
steel tubing
·
to prevent the discoloration
of the
chrome plates exhaust pipe.
The exhaust noise is
reduced as it passes through the expansion chamber,
separator in the muffler and the remaining noise is
absorbed as
it
passes through the silencing chamber
packed with steel wool.
(Fig.
4.
52 and
4.
53)
B.
Inspection
1.
Inspect the muffler gasket for damage.
2.
Inspect the muffler for cracks, dents and other
defects.
C.
Reassembly
l.
Install the exhaust pipe gasket
on
the cylinder
head and te:nporarily tighten the pipe joint with
the
collar and
special 6 mm heat resisting nut.
2
.
After completing
the muffler installation, tighten
the
exhaust
pipe joint nut.
(Fig. 4. 54)
NOTE:
If the exhaust pipe joint nut
is
tightened first,
it will be difficult to install the muffler.
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