SECTION F19
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EXHAUST SYSTEM
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The dismantling and reassembly routine for
Commando models with the various low level exhaust
systems is similar but the high level system of the
"S" model, upswept to the left side requires a
different technique. The downswept exhaust systems
are shown in Fig. F16 1 and the "S" type system in
Fig. F17.
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Removing and Refitting - all models except
"S" type:
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1
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On late models with exhaust lockring tab
washers, flatten back the tabs.
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2
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Using service tool 063968 unscrew the finned
exhaust lockrings and allow these to hang on the
exhaust pipes.
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3
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Remove the nuts securing the muffler (silencer)
mounting plates to the rubber mountings, so that at
the next stage the mufflers are removed with plate
attached.
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4
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Lift each exhaust system clear.
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5
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When assembling the exhaust system, fit the
copper/asbestos sealing ring into the exhaust port,
offer the exhaust pipe to the port and, holding in
the correct position, tighten the lockring
sufficiently to hold the exhaust pipe in the
correct position whilst permitting it to be rotated
slightly. Now assemble the muffler to the exhaust
pipe and to the muffler mountings.
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6
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Tighten completely the muffler mountings,
forward clip and lockring.
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When refitting the exhaust system, if the
exhaust system is not assembled correctly to the
frame, it can lie in the wrong plane. The tendency
is to push the system to its lowest position during
fitting so that the centre stand and other
equipment can come into contact with the exhaust
pipe and mufflers. Assembly as above will prevent
both misilignment and strain on any of the
fittings.
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Removing and Refitting "S'' type Exhaust:
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1
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Using service tool 063968 unscrew the finned
exhaust lockrings and allow to remain loosely in
place.
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2
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Remove nut from rubber mount block on bracket
adjacent to suspension unit.
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3
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Lift off pipe and muffler complete.
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4
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Repeat for other pipe and muffler.
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5
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On reassembly, the use of new type tabbed
washers to secure the lockrings is recommended.
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