Yamaha pw80 - Manual (Page 34)

MUFFLER
With the carburetor removed, proceed as
follows:
^WARNING
Be sure the exhaust pipe and muffler are
cool before cleaning the spark arrester.
Removal
1. Remove the two nuts and remove seat.
2. Remove the three bolts from the side
cover assembly and two bands.
3. Remove the muffler mounting bolts from
the cylinder and remove the silencer
mounting bolts.
Maintenance
^WARNING
1. Muffler
a. Using a rounded scraper, remove ex­
cess carbon deposits from manifold
area of exhaust pipe.
b. Check muffler gasket condition. The
gasket seat is located around the
cylinder exhaust port.
2. Spark arrester cleaning
a. Remove the bolt ®.
b. Remove the tailpipe (2) by pulling out
of the muffler.
c. Use a wire brush to remove any car­
bon deposits from the spark arrester
portion of the tailpipe (2).
d. Tap the tailpipe (2) lightly and remove
the carbon deposits from the outside
portion of the tailpipe.
e. Insert the tailpipe into the muffler
and align the bolt hole.
f. Install the bolt ® and tighten it.
Tightening torque:
8 Nm (0.8 m-kg, 5.8 ft-lb)
1. Bolt a. Tailpipe
•Always let the exhaust system cool prior
to touching exhaust components.
•Do not start the engine when cleaning
the exhaust system.
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TOP END
Removal
1. Remove spark plug cap and spark plug.
2. Remove the cylinder head securing nuts
(4 nuts).
Remove cylinder head and gasket.