APRILIA SCARABEO 500 2008 Service Station Manual page 174

Engine
Inspecting the small end
- Measure the inside diameter of the rod small end
using a bore meter.
NOTE
IF THE ROD SMALL END DIAMETER EXCEEDS
THE STANDARD DIAMETER, SHOWS SIGNS
OF WEAR OR OVERHEATING, REPLACE THE
CRANKSHAFT AS DESCRIBED IN THE
«CRANKCASE AND CRANKSHAFT» CHAP-
TER.
Characteristic
Standard diameter:
22 + 0.025 +0.015 mm
Inspecting the wrist pin
- Check the pin outside diameter using a micrometer.
Characteristic
Standard diameter:
22 -0.004 mm
- Calculate the rod small end - pin coupling clear-
ance.
Characteristic
Standard clearance:
0.015 ÷ 0.029 mm
Inspecting the piston
- Measure the diameter of the bearings on the pis-
ton.
Characteristic
Standard diameter:
22 + 0.006 +0.001 mm
- Calculate the pin - piston coupling clearance.
ENG - 174
SCARABEO 500