APRILIA RX 50 RACING - 2003 Manual page 62

COOLANT CHECKING
Do not use the vehicle if the coolant is be-
low the minimum allowed level.
Do not remove the radiator plug when the engine
is hot, since the coolant is under pressure and its
temperature is high. If it gets in contact with the
skin or with clothes it can cause severe burns
and/or damages.
The coolant is noxious:
DO NOT SWALLOW IT.
KEEP AWAY FROM CHILDREN.
62
Every 2000 km or after using the vehicle in difficult
conditions, check the coolant level with cold engine;
change the coolant every two years.
The coolant level must be included between 1/4th
and 3/4ths of the expansion tank capacity.
If necessary, provide for topping up.
The standard coolant makes it possible to expose the
vehicle to temperatures down to -17°C.