3
91
E
N
G
IN
E ASS
E
M
B
LY AN
D CO
NTRO
LS
2
1
Check the state of use of the silent-blocks as
follows. Clamp the gear
B
intended to mesh
with kickstart idler gear, using protective ele
-
ments. Rotate the clutch basket. If there is play
between the basket and the gear unit, replace
the clutch basket.
Check the state of use of the centre bearing
1
which must have no traces of meshing or ab
-
normal wear.
Check the state of use of the roller bearing
2
. If
it is worn, have it replaced.
3.12.2 CHECKING CLUTCH DISCS
The clutch discs are divided into friction discs
and steel discs: there are eight friction discs
and seven steel discs.
The friction discs have friction material applied
on both sides which wear out due to the steel
discs sliding on them.
Make sure that the thickness of each friction
disc is not below the minimum value fixed at:
minimum thickness: 2,8mm
The other value that needs to be checked is
the thickness of the teeth of each friction disc.
They must not be less than the minimum value
fixed at:
minimum friction disc tooth thickness: 13,3mm
Internal centre bearing and roller bearing of clutch
gear.
Minimum thickness.
Minimum disc tooth thickness.
