23GS 461
: Carefully fit the muffler (1)
: Coat the screws (2) with Loctite,
b 12
: Fit screws (2) and check that
cooling plate or gasket is
correctly positioned
: Insert and tighten the screws (2)
– insert new gasket
: Coat the screws (3) with Loctite,
b 12
: Position exhaust casing (1),
screw in and tighten screws (2),
screws (3)
2411RA030 TG
2
2
1
1
2
2411RA031 TG
3
2
3
5.2 Leak testing
Defective oil seals and gaskets or
cracks in housing are the usual
causes of leaks. Such faults allow
supplementary air to enter the
engine and upset the fuel-air
mixture.
This makes adjustment of the
prescribed idle speed difficult, if not
impossible.
Moreover, the transition from idle
speed to part or full throttle is not
smooth.
Oil seals tend to fail when subjected
to a vacuum, therefore always start
with the vacuum test and then
continue with the pressure test.
The engine can be thoroughly
checked for leaks under vacuum
and at gauge pressure using the
pump 0000 850 1300.
5.2.1 Preparations
– Remove filter cover and air baffle
– Remove shroud, b 5.4
– Take off the spark plug boot and
remove the spark plug
– Set the piston to the top
dead center (this can be checked
through the spark plug hole)
– Remove the decompression
valve, b 5.9
: Fit the stopper (1) 1122 025 2200
and screw it tight
: Screw in spark plug (2) and
tighten it securely
– Remove exhaust casing and
loosen muffler screws, b 5.1
2411RA032 TG
1
2
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