PIAGGIO 2005 XEVO 400ie, Workshop Manual

Page: 124 / 376

THE PIN HOUSINGS HAVE 2 LUBRICATION CHANNELS. FOR THIS REASON, MEASUREMENT
MUST BE MADE ACCORDING TO THE PISTON AXIS.
Characteristic
Standard clearance:
0.001 ÷ 0.010 mm
- Measure the outside diameter of the piston, per-
pendicular to the gudgeon pin axis.
- Take the measurement in the position shown in
the figure.
N.B.
REFER TO THE «SPECIFICATIONS» SECTION FOR THE
SIZES OF THE PISTON AND THE CYLINDER-PISTON COU-
PLING CLEARANCES.
Characteristic
A:
10 mm
Piston diameter:
85.8 mm nominal value
- Using a bore meter, measure the cylinder inner
diameter at a given height according to the direc-
tions shown in the figure.
Characteristic
B:
43 mm
Standard diameter:
85.8 mm nominal value
- Check that coating is free from flakes.
- Check that the head matching surface exhibits no deformations or wear.
Characteristic
Maximum allowable run-out:
0.05 mm
Engine
XEVO 400ie
ENG - 124