MV Agusta 2008 F4 312RR 1078 Workshop Manual page 50

C
Substitution of the valve slot
The following tools are necessary for this procedure:
prick-puncher n° 800095319 for inlet slot
prick-puncher n° 800095318 for exhaust slot
Proceed as follows:
A)Remove the worn slots carefully milling them so as
not to damage the head lodging
B)Check the lodging diameter on the head and choo-
se the oversized valve slot considering that the
assembling interference should be 0,10÷0,15
mm.
C)Valve slots are furnished with an increased replace-
ment part of 0,03 mm on the external diameter.
D)Slowly and evenly heat the head at a max tempera-
ture of 180°C and cool the new slots with dry ice.
E)Place the slots perfectly in frame into its lodging,
using the special n° 800095319 prick-puncher
(INLET) e n° 800095318 (EXHAUST)
F) Let cool and proceed with the milling of the slots and
grinding the valves referring to the following quoti-
ents:
Ø A
Ø S
[E]
Cylinder kit
0
28,60
+0,3
0
24,6
+0,3
+0,2
1
-0,3
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800095319 800095318