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WARNING
Avoid parking the vehicle catalytic ver-
sion near dry brush wood or in places
easily accessible to children, as the cat-
alytic silencer becomes extremely hot
during use; be very careful and avoid
any kind of contact before it has com-
pletely cooled down.
The catalytic vehicle is fitted with a silencer
with metal catalytic converter of the "plati-
num-rhodium bivalent" type.
This device provides for the oxidation of
the CO (carbon monoxide) and of the HC
(unburned hydrocarbons) contained in the
exhaust gases, changing them into carbon
dioxide and steam, respectively.
34
use and maintenance Scarabeo 50 - Scarabeo 100
Due to the catalytic reaction, the high tem-
perature reached by the exhaust gases
makes for the burning of the oil particles,
thus keeping the silencer clean and elimi-
nating the exhaust fumes.
To have the catalytic converter function
correctly and for long and to reduce possi-
ble problems regarding the soiling of the
thermal unit and of the exhaust, it is neces-
sary to avoid covering long distances with
the engine running at constantly low rpm.
It is sufficient to alternate these periods
with periods in which the engine runs at rel-
atively high rpm, even if only for a few sec-
onds, but rather frequently.
What has been stated above assumes par-
ticular importance for the cold starting of
the engine: in this case, in order to reach a
rpm regime sufficient to enable the "prim-
ing" of the catalytic reaction, just make
sure that the temperature of the thermal
unit has reached at least 50°C, which gen-
erally occurs a few seconds after starting
the engine.
CAUTION
Do not use leaded petrol, since it caus-
es the destruction of the catalytic con-
verter.
WARNING
Tampering with the noise control sys-
tem is prohibited.
Owners are warned that the law may pro-
hibit:
– the removal or rendering inoperative by
any person, other than for purposes of
maintenance, repair or replacement, of
any device or element of design incorpo-
rated into any new vehicle – for the pur-
pose of noise control – prior to its sale or
delivery to the ultimate purchaser or
while it is in use; and
– the use of the vehicle after such device
or element of design has been removed
or rendered inoperative by any person.
Check the exhaust silencer and the silenc-
er pipes, making sure that there are neither
signs of rust, nor holes and that the ex-
haust system works effectively.
If the noise produced by the exhaust sys-
tem increases, immediately contact your
aprilia Official Dealer.
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