MV Agusta 2008 F4 312RR 1078 Workshop Manual page 62

Cylinder and piston assembly
The segments must be assembled on the piston with
the writing R RN turned upwards and by following the
outline in the figure.
C
Oil the connecting rod foot and piston pin.
Assemble the internal ring on the piston
Insert the pistons complete with segments on the
connecting rods with the arrow facing the exhaust
Insert the piston pins into the piston until beat.
Assemble the external rings.
Before securing the piston pins with the
blocking rings, cover the bedplate opening
with a clean rag to avoid any pieces from fal-
ling into the oil cup. Always use new
blocking rings.
Assemble a new gasket between the cylinder and bed-
plate.
Position the clamps onto the pistons in the direction
shown in the sketch.
Oil cylinders and clamps.
Position the two pistons 1 and 4 at the MSP turning the
drive shaft.
First insert the two pistons at the MSP, thus rotate the
drive shaft at 180° to invert the piston positions and to
insert the two remaining ones.
Insert the pistons by manually pushing down on the
segments.
Proceed with maximum care since it concerns a very
delicate procedure due to the fragility of the segments.
Make some turns with the unloaded drive shaft and
check to be sure that the pistons move freely without
force.
Cylinder kit
- 32 -
3rd Bottom 3rd Top
3rd Spring