APRILIA RSV mille 956X Service And Repair Manual page 105

ENGINE
Unscrew and remove the two M6 T.C.E.I. screws (24).
Unscrew and remove the four M10 nuts (25).
a
WARNING
Be careful to avoid possible injury caused by allow-
ing hands to get trapped between the cylinder and
the stud bolts (28).
Remove the cylinder (26) together with the complete
head (27).
a
CAUTION
When removing the cylinder, take care not to damage
the cylinder.
Be careful to keep the two locating dowels (29) from
dropping inside the crankcase.
NOTE
See 3.6.23 (HEAD AND CAMSHAFT) for in-
structions on taking the complete head apart.
Cover the opening in the base with a clean cloth.
Remove the cylinder base gasket from its slot and pull
out the two locating dowels (29).
a
CAUTION
Do not apply any mechanical markings.
Use a felt pen to mark the piston crown on the exhaust
side (30) to remind you which direction it should be re-
assembled in.
In the same way, mark both the piston and the cylinder
with a "1" so that the two components can be recon-
nected in the same point.
a
CAUTION
In order to prevent unbalanced forces, the axis of the
pistons' gudgeon pin is positioned off-centre, to-
wards the front of the vehicle.
When reassembling, the piston must be positioned
on the connecting rod facing the right way.
Use a sharp screwdriver (31) to remove the seeger ring
(32) (securing the gudgeon pin).
Use a special drift to push out the gudgeon pin (33).
a
CAUTION
Hold the piston in one hand so that the connecting
rod bush is not tilted and hence damaged.
Remove the piston (34).
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RSV mille