Catalytic Silencer; Exhaust Silencer - APRILIA SR 50 - 2000 Manual

CATALYTIC SILENCER

WARNING
Avoid parking the vehicle catalytic ver-
sion near dry brush wood or in places
easily accessible to children, as the cata-
lytic silencer becomes extremely hot dur-
ing use; be very careful and avoid any
kind of contact before it has completely
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.
use and maintenance SR 50
30
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 eliminating
the exhaust fumes.
To have the catalytic converter function cor-
rectly and for long and to reduce possi-ble
problems regarding the soiling of the ther-
mal unit and of the exhaust, it is necessary
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 relatively
high rpm, even if only for a few seconds, 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 "priming" of
the catalytic reaction, just make sure that the
temperature of the thermal unit has reached
at least 50 C, which generally occurs a few
seconds after starting the engine.
CAUTION
Do not use leaded petrol, since it causes
the destruction of the catalytic converter.

EXHAUST SILENCER

WARNING
Tampering with the noise control system
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 purpose
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 silencer
pipes, making sure that there are neither
signs of rust, nor holes and that the exhaust
system works effectively.
If the noise produced by the exhaust system
increases, immediately contact your aprilia
Official Dealer.