Disassembling Cylinder "2" (Rear); Head And Piston - APRILIA RSV mille 956X Service And Repair Manual

RSV mille

3.5.4 DISASSEMBLING CYLINDER "2" (REAR),

HEAD AND PISTON

Carefully read 0.2.1 (PRECAUTIONS AND GENERAL
INFORMATIONS).
NOTE
The following operations can be performed with-
out removing the engine from the frame.
a
WARNING
The head must be disassembled together with the
cylinder.
This is the only way in which the head can be de-
tached from the actual cylinder.
Remove the two spark plugs from the head, see 2.7
(SPARK PLUGS).
Unscrew and remove the five complete M6 spacer
screws (1) and remove the head cover (2) together with
the relevant gasket.
Remove the closing screw, made from plastic, com-
plete with O-ring housed in the centre of the flywheel
cover (3).
Remove the M8 T.C.E.I. screw (4) complete with seal.
a
CAUTION
When turning the driving shaft, guide the connecting
rod and timing chain of cylinder "1" so as to prevent
them from getting stuck inside the housing.
Use a size 14 bent hexagon-head driver (5) to turn the
driving shaft anticlockwise approx. 300° so that piston
"2" is at TDC (ignition).
NOTE
At the TDC (ignition), the reference marks "IN"
(6) and "EX" (7) of the two gears prove parallel to the
head uncoupling surface, and face each other.
Screw the M8 threaded bolt (8) on by hand so that you
can feel it fit perfectly inside the driving shaft fastening
slot.
NOTE
Turn the driving shaft both ways to make sure
that the threaded bolt is engaged perfectly.
The bolt should not be overtightened; max. 5 Nm (0.5
kgm).
Insert an appropriate drift (diam. 7.5 mm) (9) in the
countershaft hole (10).
Unscrew and remove the M14x1 nut (11).
a
CAUTION
When loosening the T.E. nut (11), counter the force
with the drift (9) so as not to strain the driving chain.
Remove the counterweight (12) from the countershaft.
ENGINE
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