APRILIA RS 50 - 1999 Manual page 44

This motorcycle is equipped with tubeless
tires.
 
WARNING
Check the tire inflation at room temper-
ature at least once a week, see p. 90
(TECHNICAL DATA).
Pressure measurement must always be
carried out when the tires are cold, as
when the tires are warmed up, pressure
will increase, and if they are checked at
this time erroneous readings will be
seen.
If the tire is inflated to too high a pres-
sure, an uncomfortably harsh ride will
result, and riding comfort will be com-
promised. Also, road holding, especial-
ly during turns and in wet conditions,
will likewise be compromised.
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44 use and maintenance RS 50
If the tire is underinflated (pressure is
too low), the tire may slip on the rim
with consequent loss of control. Again,
road holding and handling characteris-
tics will be degraded, and brake perfor-
mance will be reduced.
When the tire is worn to a point where
any tread is less than 0.12 in (3 mm)
deep, the tire is worn out, and must be
replaced. Also, if a tire suffers a punc-
ture that is larger than 0.20 in (5 mm) in
its longest dimension, the tire must not
be repaired, but should be replaced.
After a tire is repaired, balance the
wheels. Use only tires that are listed,
see p. 90 (TECHNICAL DATA).
Insure that all tires are equipped with
properly installed valve caps.
 
WARNING
Do not use the motorcycle if the tyre
wear indicators signal that a change is
necessary.
Some types of tyres homologated for
this motorcycle are provided with wear
indicators.
There are several kinds of wear indica-
tors.
For more information on how to check
the wear, contact your Dealer.
Visually check if the tyres are worn and
in this case have them changed.
If a tyre goes flat while you are using the
motorcycle, do not attempt to go on and
avoid braking and steering abruptly.
Slowly move to the roadside and stop,
using the engine compression to brake.
Non-compliance with these instructions
may cause accidents with consequent
risk of injuries or even death.
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, have the tyres changed.
Have the tyre changed when it is worn
out or in case of puncture on the tread
side, if the puncture is larger than 0.20
in (5 mm).
After repairing a tyre, have the wheels
balanced.
Use only tyres in the size suggested by
, see p. 90 (TECHNICAL DATA).
Do not install tyres with air tube on rims
for tubeless tyres and viceversa.
Make sure that the tyres always have
their valve sealing caps on, to prevent
them from suddenly going flat.
Repair, maintenance, changing and bal-
ancing of tires are very important to
your safety, and should only be per-
formed by qualified mechanics using
the appropriate tools.
For this reason, we suggest that you
have your tires serviced by your Local
Delear.