APRILIA Tuono 660 2021 Service Station Manual page 176

Engine
Checking the pusher plate
Check the thrust plate and the bearing for damage and wear. If necessary, replace the parts.
Characteristic
Maximum permissible deformation of spring carrier plate pressure face
0.15 mm (0.0059 in)
Maximum depth of spring carrier plate
27.3 mm (1.07 in)
Checking the clutch hub
Check the clutch hub for damage and wear that
may result in clutch irregular operation. If neces-
sary, replace the hub.
Checking the springs
NOTE
THE FOLLOWING PROCEDURE IS VALID FOR ALL CLUTCH SPRINGS.
•
Check the springs for signs of damage,
and replace them if necessary.
•
Measure the free length of the clutch
springs, and replace them if necessa-
ry.
Characteristic
Minimum wear limit with individual clutch
springs in release position
46.8 mm (1.84 in)
ENG - 176
RS 660 - Tuono 660