MV Agusta 2008 F4 312RR 1078, Workshop Manual

Page: 51 / 124

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C
Cylinder kit
Valve guide check and maintenance
In order to carry out this procedure the following tools
are necessary:
Control tampon
n° 800095429
Tampon n° 8000A2385
valve stem-valve guide play: 0,01÷0,03 mm inlet
0,02÷0,04 mm exhaust
coupling limit : 0,08 mm inlet
0,1 mm exhaust
internal guide Ø limit: 4,55 mm
Proceed with an accurate visual check of the valve
guide.
In order to determine the coupling wear between guide
and valve stem it is necessary to measure the play
using a control tampon and micrometer.
The control stopper 800095429 (Ø 4,55)
must not pass.
In the case of substituting the guide valve
it ist is necessary to check and if neces-
sary also substitute the valve.
Removal of the valve guide
After having removed the valves and rubber holdings
as described in the relative paragraph, continue as fol-
lows:
Slowly and evenly heat the cylinder head up to 100°.
Using stopper n° 8000A2385 slide out the valve guide.
Continue with a visual check of the slot to verify its
State.
NOTE
NOTE
800095429
8000A2385