A
B
C
D
E
F
G
H
L
M
N
P
section
N 5
108 1098/1098S - M.Y. 2007 - edition 00
Engine
Checking the piston ring/cylinder clearance
Insert the ring in the cylinder bore so that it is positioned 50 mm from the top face of the cylinder barrel; make sure that the ring
is positioned perfectly square to the cylinder walls by checking with a gauge at several points around the ring that the top surface
of the ring is exactly 50 mm from the top face of the cylinder barrel.
Measure the piston ring gap (A):
(A) mm Wear limit
Top compression ring 0.2 ÷ 0.4 0.8
Second compression ring 0.3 ÷ 0.5 0.8
Oil control ring 0.2 ÷ 0.7 1.0
50
A
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