APRILIA TUONO V4 R 2010 Service Station Manual page 349

TUONO V4 R
The Blow-by system uses the rotation of the countershaft (1) to separate the engine oil into oil vapour
and liquid.
The oil vapours exit from the fitting (2) on the alternator cover and enter the air filter box whereas the
liquid returns to the oil sump.
SAS valve
pos. Description
1 Secondary air system solenoid
screws
Diagram
Valve controlled by control unit which delivers as-
pirated air from the filter box to the exhaust mani-
folds.
The advantages of this function are twofold:
•
the catalytic converter reaches the op-
erating temperature more quickly;
•
it permits the use of richer mixtures in
some critical conditions (e.g. at idle or
low engine speeds).
S
ECONDARY AIR SYSTEM
Type Quantity
- 2
Torque
10 Nm (7.37 lbf ft)
Engine
Notes
-
ENG - 349