Tyres; Catalytic Silencers; Catalytic Silencers (For The Catalytic Version Only) - APRILIA RS 250 - 1998 Manual

TYRES

This vehicle is provided with tubeless
tyres.
a
Periodically check the tyre infla-
tion pressure at room tempera-
ture, see p. 82 (TECHNICAL DA-
TA).
If the tyres are hot, the measurement is
not correct.
Carry out the measurement especially
before and after long rides.
If the inflation pressure is too high, the
ground unevenness cannot be damp-
ened and is therefore transmitted to the
handlebar, thus compromising the driv-
ing comfort and reducing the road hold-
ing during turns.
If, on the contrary, the inflation pres-
sure is too low, the tyre sides are under
greater stress and the tyre itself may
slip on the rim or it may become loose,
with consequent loss of control of the
vehicle.
In case of sudden braking the tyres
could even get out of the rims. Further,
the vehicle could skid while turning.
Check the surface and the wear of the
tyres, since tyres in bad conditions can
impair both the grip and the controlla-
bility of the vehicle.
38 use and maintenance RS 250
Change the tyre when it is worn out or
in case of puncture on the tread side, if
the puncture is larger than 5 mm.
After repairing a tyre, have the wheels
balanced. Use only tyres in the size
suggested by aprilia, see p. 82 (TECH-
NICAL DATA).
Make sure that the tyres always have
their valve sealing caps on, to prevent
them from suddenly going flat.
Change, repair, maintenance and bal-
ancing operations are very important
and should be carried out by qualified
technicians with appropriate tools.
For this reason, it is advisable to have
the above mentioned operations carried
out by an aprilia Official Dealer or by a
qualified tyre repairer.
If the tyres are new, they may still be
covered with a slippery film: drive care-
fully for the first miles. Do not oil the
tyres with unsuitable fluids.
If the tyres are old, even if not complete-
ly worn out, they may become hard and
may not ensure good road holding.
In this case, replace them.
MINIMUM TREAD DEPTH LIMIT
front: ............................................... 2 mm
rear: ................................................ 2 mm

CATALYTIC SILENCERS

(for the catalytic version only)
a
Avoid parking the vehicle-cata-
lytic version near dry brush
wood or in places easily accessi-
ble to children, as the catalytic silencer
becomes extremely hot during use; be
very careful and avoid any kind of con-
tact before it has completely cooled
down.
The catalytic vehicle is fitted with two si-
lencers with metal catalytic converter of the
"platinum-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.
a
Do not use leaded petrol, since it
causes the destruction of the
catalytic converter.
2