3
101
E
N
G
IN
E ASS
E
M
B
LY AN
D CO
NTRO
LS
2
1
A
3
3.15
CHECKING AND CoU-
PLING of tIMING CHAIN,
fIXED AND MoBILE GUI-
DES
The chain has the task of transmitting motion from
the crankshaft to the camshafts present on the cylin-
der head. The links must be checked to make sure
there is no excessive radial or axial play between
them.
The fixed and movable guides guarantee a correct
movement of the chain. The hydraulic chain tensio-
ner ensures correct tensioning.
Make sure that the guides do not have deep traces
caused by the rotation of the chain.
In order to assemble the chain to the engine, just
introduce it in the vertical passage compartment A
on the left crankcase and insert it in the gear on the
crankshaft.
Insert the fixed guide
1
and the movable guide
2
in-
side the compartment
A
. Insert the specific 6.2x9x9
bushes inside the lower eyelets of the guides. Af-
ter having applied medium strength threadlocker,
tighten the relative screws
3
at a torque of 10Nm.
3.16
IGNItIoN SYStEM
Before reassembling the ignition system, it is recom-
mended to check its correct functioning.
The ignition system is made up of the magnetic pick-
up, the stator unit and the flywheel. The system is
completed by the electronic control unit, the ignition
coil and the spark plug, which are not dealt with in
this text.
10Nm
Timing chain with relative fixed and movable guides.
Mounting bushes in lower eyelets of guides.
