APRILIA SHIVER 900 Service Station Manual page 72

Maintenance
•
Operating from both ducts, turn the up-
per part of the intake duct anticlock-
wise and remove it.
•
Remove the filter element.
COVER THE INTAKE DUCTS WITH A CLEAN CLOTH TO
PREVENT FOREIGN BODIES FROM ENTERING THE IN-
TAKE DUCTS. UPON REFITTING, BEFORE REPLACING
THE FILTER CASE COVER , MAKE SURE THAT THE
CLOTH OR OTHER OBJECTS ARE NOT LEFT INSIDE.
MAKE SURE THAT THE FILTER ELEMENT IS CORRECTLY
POSITIONED, SO NO UNFILTERED AIR CAN PASS. DO
NOT FORGET THAT THE EARLY USE OF THE PISTON AND
CYLINDER SEGMENTS CAN BE CAUSED BY A FAULTY
OR MISPLACED FILTER ELEMENT.
REFITTING
•
When replacing, pay attention to the introduction of the intake ducts, making sure that the
bayonet plug is snapped after each duct is inserted and rotated.
•
Check the correct positioning of the fil-
ter, making sure that the arrow printed
on it is directed toward the steering
clutch.
Checking the valve clearance
•
Remove the fuel tank and the radiator.
•
Disconnect the coils and remove the spark plugs.
•
Remove the covers from the heads and measure the distance between the camshaft nose
cone and the valve tappets using a feeler gauge.
•
make a note of the measurement
Characteristic
Intake valve clearance
0.10 - 0.15 mm (0.0039 - 0.0059 in)
MAIN - 72
SHIVER 900