Gilera SATURNO BIALBERO 350 Workshop Manual page 96

REAR SUSPENSION AND WHEEL 14
Chain sprocket inspection
Check sprocket teeth; replace if worn or damaged.
Check both the chain and driven sprocket.
Sprocket in good shape (fig. 4A).
Replace sprocket (fig. 4B).
Max. allowable wear (fig. 5).
NOTE
The sprocket retainer hub (flange) is mounted on the rim.
The flexible coupling screws are the same ones that hold the chain
sprocket to the flange.
Loosen the bolts that act as pivot bolts to the flexible couplings to remove
the sprocket from the flange (fig. 6).
Replace the rubber flexible couplings if damaged or worn.
The flexible couplings are made up by two components; one inner metal
ring and one outer rubber ring (fig. 7).
If the wheel bearings need to be replaced, remove the bearings and
spacer; once removed, the bearings must always be replaced with new
ones. Use a hydraulic press and the correct tool to mount the bearings
(fig. 8).
Sprocket flange bearings replacement
Remove snap ring (fig. 9).
Remove coupler.
Remove bearings (fig. 10).
Sprocket flange bearings reassembly
Install bearings (fig. 11).
Install wheel spindle coupling.
Install snap ring.
Remember to always grease the bearings.
14 - 2,3