Benelli Tornado Tre Novicento 903, Workshop Manual, Page: 126 / 336

UK
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L I M I T E D E D I T I O N
5.2.2 CHECK CYLINDER HEAD
WARNING:
Do not use a pointed instrument to avoid damaging
or scatching:
Sparking-plug hole threading
Valve seat
Check and eventually eliminate carbon deposits in the
combustion chamber with a rounded-off scraper.
If the surface is damaged or scratched, change the element.
Check the distortion of the cylinder head as indicated in the
figure. If is is outside the specific value, rectify the head.
VALUE LIMIT
HEAD DISTORTION
max. distortion = 0.1 mm
5.2.3 MOUNT CYLINDER HEAD
NOTE:
Always use new gaskets. Clean and degrease the
head surface and the cylinders.
Position the cylinder head. Position the fixing screws and nuts.
Tighten to the specified worm drive following the order in the
figure in the following phases:
1st phase: 2.5 Kg-m; 2nd phase: 3.5 Kg-m
3rd phase: 4.5 Kg-m; 4th phase: final tightening with
an angle of 50°+50°
NOTE: Apply grease to the fixing nuts to oil the
threading (MOLIKOTE® CU7439 PLUS copper
grease).
N.B. This tightening requires a worm drive angle wrench.