APRILIA SCARABEO 500 2008 Service Station Manual page 175

SCARABEO 500
NOTE
THE PIN HOUSINGS HAVE TWO LUBRICATION CHANNELS FOR THIS REASON MEASURE THE
DIAMETER ACCORDING TO THE PISTON AXIS
Characteristic
Standard clearance:
0.001 ÷ 0.010 mm
- Measure the piston outside diameter, perpendic-
ular to the pin axis.
- Carry out the measurement according to the po-
sition shown in the figure:
NOTE
TO MEASURE THE PISTON AND THE CYLIN-
DER-PISTON COUPLING CLEARANCE REFER
TO THE «SPECIFICATIONS» SECTION.
Characteristic
A:
10 mm
Piston diameter:
Nominal value: 94 mm
- Using a bore meter, measure the cylinder inside
diameter according to the directions shown in the
figure and at the prescribed height.
Characteristic
B:
43 mm
Standard diameter:
Nominal value: 94 mm
- Check that the coating is not peeled off.
- Check that the coupling surface with the head is not worn or distorted.
Characteristic
Maximum run-out allowed:
0.05 mm
Engine
ENG - 175