A
B
C
D
E
F
G
H
L
M
N
P
section
N 5
104 1098/1098S - M.Y. 2007 - edition 00
Engine
Overhaul of the cylinder barrel/piston components
Overhauling the cylinder
Check that the walls are perfectly smooth. Measure the cylinder bore diameter at 50 mm from the top surface and determine
the size class to which it belongs in accordance with the values specified in Sect. C 1.1. Measure the bore diameter again at
three different heights A, B and C and at positions offset by 90°; compare the measurements taken with the values given in
Sect. C 1.1 to determine any taper and ovality in the bore.
In the event of damage or excessive wear the barrel must be renewed as it has a silicon carbide coating (which provides the
cylinder walls with excellent anti-friction and anti-wear properties) and therefore cannot be rebored.
The cylinder barrels are marked with letters (stamped between two oil return ways) indicating their size class.
Always match cylinders with pistons from the same size class.
50
A
B
C
Ø
Ø
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