Ducati 1098 2007 Manual page 462

section
N 4.5
Checking the valve
Check that the stem and the surface that contacts the valve seat are in good condition.
A
There must be no pitting, cracks, deformations or signs of wear.
Warning
The valves cannot be ground.
B
C
D
Perform the following checks.
Measure the diameter of the valve stem (B) at various points along the section that runs in the valve guide.
E
F
G
Check the valve stem for buckling. Place it on a "Vee" block and measure deformation with a dial gauge.
Service limit: 0.053 mm.
Check that the valve head band (at 45° to the valve head top face) is concentric to the valve stem as follows: place the valve on
a Vee block, set a dial gauge at right angles to the head and rotate the valve.
H
Nominal concentricity: 0.01 mm.
Service limit: 0.03 mm.
L
M
N
P
88
Engine
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1098/1098S - M.Y. 2007 - edition 00