APRILIA SR 50 - 2003, Manual, Page: 227 / 288

35 use and maintenance SR 50
Due to the catalytic reaction, the high
temperature 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
correctly and for long and to reduce possible
problems regarding the soiling of the thermal
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
particular importance for the cold starting of
the engine: in this case, in order to reach an
rpm range sufficient to “trigger” 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 fuel, 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 prohibit:
-
the removal or rendering inoperative by
any person, other than for purposes of
maintenance, repair or replacement, of
any device or element of design
incorporated 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 made 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.