Cleaning The Spark Arrester - Yamaha 2004 YXR660 Service Manual

CHECKING THE V-BELT/

CLEANING THE SPARK ARRESTER

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5. Remove:
• drive belt cover
Refer to "PRIMARY AND SECONDARY
SHEAVES" in chapter 4.
• console
• passenger seat
• driver seat
Refer to "SEATS, ENCLOSURE, HOOD
AND CARGO BED" in chapter 8.
CLEANING THE SPARK ARRESTER
1. Clean:
• spark arrester
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WARNING
• Select a well-ventilated area free of com-
bustible materials.
• Always let the exhaust system cool
before performing this operation.
• Do not start the engine when removing
the tailpipe from the muffler.
a. Remove the bolts 1.
b. Remove the tailpipe 2 by pulling it out of
the muffler.
c. Tap the tailpipe lightly with a soft-face ham-
mer or suitable tool, then use a wire brush
to remove any carbon deposits from the
spark arrester portion of the tailpipe and the
inner contact surfaces of the muffler.
d. Insert the tailpipe 2 into the muffler and
align the bolt holes.
e. Insert the bolt 1 and tighten it.
f. Start the engine and rev it up approximately
twenty times while momentarily creating
exhaust system back pressure by blocking
the end of the muffler with a shop towel.
g. Stop the engine and allow the exhaust pipe
to cool.
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CHK
ADJ
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