APRILIA SCARABEO 125 Service Manual page 101

SCARABEO 125 - 200
Maximum diameter: 15.023 mm (0.591 in)
Standard diameter: 15.010 - 15.018 mm (0.5910 - 0.5912 in)
Inspecting the wrist pin
•
Check the pin outside diameter.
Characteristic
Pin (125 - 200)
Minimum diameter: 14.995 mm (0.590 in)
Standard diameter: 15.0000 +0/-0.0030 mm (0.00012 in)
Inspecting the piston
•
Measure the pin seat diameter on the
piston.
•
Calculate the pin - piston coupling
clearance.
•
Measure the piston outside diameter,
perpendicular to the pin axis.
•
Take the measurement at 6 mm (0.24
in) from the base, at the position shown
in the figure.
•
Carefully clean the sealing rings hous-
ings.
•
Measure the sealing rings - grooves
coupling clearance using suitable sen-
sors, as shown in the diagram
•
If clearances measured exceed the
limits specified in the table, the piston
should be replaced by a new one.
NOTE
MEASURE CLEARANCE BY INSERTING THE BLADE OF
THE FEELER GAUGE FROM THE 2nd SEALING RING
SIDE.
Characteristic
Piston / cylinder (125/200)
Engine
ENG - 101