Checking The Exhaust System; Adjusting The Exhaust Gas Volume; Cleaning The Spark Arrester - Yamaha Wolverine YX70EPNG Service Manual

1 2
3. Install:
• Rear panel (right)
Refer to "GENERAL CHASSIS (1)" on page
4-1.
• Center storage compartment
Refer to "GENERAL CHASSIS (3)" on page
4-6.
EBS30031

CHECKING THE EXHAUST SYSTEM

1. Check:
• Exhaust pipe "1"
• Muffler "2"
• Muffler mount "3"
• Springs "4"
Cracks/damage → Replace.
• Gaskets "5"
Exhaust gas leaks → Replace.
2. Check:
• Tightening torque
Exhaust pipe nut
20 Nm (2.0 m·kgf, 14 ft·lbf)
Muffler bolt
23 Nm (2.3 m·kgf, 17 ft·lbf)
Muffler mount shaft
17 Nm (1.7 m·kgf, 12 ft·lbf)
LOCTITE®
4
3
4
EBS30574

ADJUSTING THE EXHAUST GAS VOLUME

TIP
• Be sure to set the CO density level to standard,
and then adjust the exhaust gas volume.
1
5
2
PERIODIC MAINTENANCE
• To adjust the exhaust gas volume, use the CO
adjustment mode of the Yamaha diagnostic
tool. For more information, refer to the opera-
tion manual of the Yamaha diagnostic tool.
1. Connect the Yamaha diagnostic tool to the
coupler. For information about connecting the
Yamaha diagnostic tool, refer to "YAMAHA
DIAGNOSTIC TOOL" on page 9-39.
Yamaha diagnostic tool
90890-03231
EBS30032

CLEANING THE SPARK ARRESTER

1. Clean:
• Spark arrester
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EWB03080
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 and gasket "3".
2
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.
3-7
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1
2
1
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