APRILIA RS 50 TUONO Use And Maintenance Book page 29

The coolant is made up of 50% water and
50% antifreeze.
This mixture is ideal for most running
temperatures and ensures good protection
against corrosion.
It is advisable to keep the same mixture
also in the hot season, since in this way
losses due to evaporation are reduced and
i t i s n o t n e c e s s a r y t o t o p u p v e r y
frequently.
The mineral salt deposits left in the radiator
by evaporated water are thus reduced and
the efficiency of the cooling system
remains unchanged.
If the outdoor temperature is below 0°,
check the cooling circuit frequently and if
n e c e s s a r y i n c r e a s e t h e a n t i f r e e z e
concentration (up to maximum 60%).
For the cooling solution use distilled water,
in order not to damage the engine.
WARNING
Do not remove the filling plug (1) when
the engine is hot, since the coolant is
under pressure and its temperature is
high.
CHECKING AND TOPPING UP
WARNING
Check the coolant level and top up the
expansion tank with cold engine.
Stop the engine and wait until it has
◆
cooled down.
NOTE
Position the vehicle on firm and
flat ground.
WARNING
Danger of fall or overturning.
When the vehicle is straightened from the
parking position to the driving position,
the stand goes automatically up.
Keep the vehicle in vertical position, with
◆
the two wheels resting on the ground.
Loosen the filling plug (1) (by giving it
◆
t w o a n t i c l o c k w i s e t u r n s ) , w i t h o u t
removing it.
Wait a few seconds in order to release
◆
any residual pressure.
NOTE
A breather pipe (2) is connected
t o t h e p l u g ( 1 ) . N e i t h e r f o r c e , n o r
disconnect the breather pipe (2).
Unscrew and remove the plug (1).
◆
WARNING
The coolant is noxious: do not swallow
it; if the coolant gets in contact with the
skin or the eyes, it can cause serious
irritations.
Do not use your fingers or any other
object to check if there is enough
coolant.
The seat of the plug (1) is characterized
◆
by a diameter reduction (3): visually
c h e c k i f t h e c o o l a n t r e a c h e s t h i s
reduction point.
3 1
Otherwise:
Top up with coolant,
◆
(LUBRICANT CHART) until the coolant
l e v e l a p p r o x i m a t e l y r e a c h e s t h e
diameter reduction point (3). Do not
exceed this level, otherwise the coolant
will flow out while the engine is running.
Put back the filling plug (1).
◆
CAUTION
In case of excessive consumption of
coolant and in case the tank remains
empty, make sure that there are no
leaks in the circuit.
Have it repaired by an aprilia Official
Dealer.
use and maintenance RS 50 Tuono
2
see p. 76
29