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APRILIA YP 250 4T Quick Workshop Handbook page 4

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REASSEMBLY
Never re-use an elastic ring. If removed, replace it
with a new ring. If a new ring is fitted, do not stretch
more than necessary when fitting it to the shaft.
Afterwards, check that the ring is properly fitted to
the housing.
Do not clean bearings with compressed air.
IMPORTANT
Bearings must rotate freely, without
sticking or noise. Replace if necessary.
-Use only ORIGINAL Aprilia SPARE PARTS.
-Stick to the oil chart and recommended wearing parts.
-Wherever possible, lubricate parts before
reassembling them.
-When tightening screws and nuts begin with the
largest diameters, or inner nuts and screws, and tighten
diagonally. Tighten each before finally tightening to the
specified torque.
-Always replace gaskets, seal rings, elastic rings, O
rings and split pins with new ones.
-Clean all joint surfaces, oil guard edges and gaskets
before reassembling.
-Lightly smear the edges of oil guards with lithium
based grease.
-Refit the oil guards and bearings with the trademark
or manufacturer's serial number facing outwards (so it
is visible).
-Grease the bearings fully before fitting.
-Check that all components have been reassembled
properly.
After a maintenance or repair operation, carry out
preliminary checks and commission the vehicle on
private property or in a low traffic area.
REFRIGERATION LIQUID
Refrigeration liquid is dangerous if swallowed;
contact with the skin or eyes could cause irritation.
For contact of this kind, wash with plenty of water
and see a doctor immediately.
If swallowed, it causes vomiting: rinse the mouth
and throat with plenty of water and see a doctor
immediately.
aprilia
THIS LIQUID AND CONTAINER SHOULD BE
PROPERLY DISPOSED OF.
KEEP OUT OF THE REACH OF CHILDREN.
Be careful not to pour any refrigeration liquid onto
hot engine parts; it could catch fire. The flames
are invisible.
Wear latex gloves during maintenance operations.
Do not use the motor cycle if the refrigeration liquid
is below the minimum required level.
Refrigeration liquid consists of one part water (50%)
for one part anti-freeze (50%) .
This mixture is suitable for most operating temperatures
and also guarantees good rust protection.
The use of the same blend is recommended during
the summer, because this reduces evaporation and
the need for frequent top ups.
It also reduces mineral salt deposits in the radiator left
by evaporated liquid and maintains the cooling system.
If the outside temperature is below 0° C, check the
refrigeration circuit frequently, adding anti-freeze if
required (for greater concentration). Max 60% anti-
freeze.
Use distilled water in the refrigerating liquid, in order
not to damage the engine.
Refrigeration liquid for the engine (recommended):
ECOBLU - 40°C or
On the basis of the freezing point of the refrigeration
liquid required, add water in the percentage given
below:
Freezing point
°C
-20°
-30°
-40°
IMPORTANT: Features vary from anti-freeze to anti-
freeze. Consult the label for the degree of protection
provided.
Use only nitrite free anti-freeze and anti-corrosion
liquid, guaranteeing protection to at least -35°C.
COOL
Refrigeration liquid
% by volume
35°
45°
55°

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