Drive Chain And Sprockets; Drive Sprocket - Yamaha LB50IIAC Service Manual

DRIVE CHAIN AND SPROCKETS
NOTE:~~~~~~~~~~~~~
Please refer
to
Maintenance Intervals and
Lubrication Intervals charts for additional in-
formation.
Drive sprocket
With the left crankcase cover removed.
proceed as follows:
1. Using a blunt chisel. flatten the drive
sprocket lock washer tab.
2. With the drive chain in place. transmis-
sion in gear. firmly apply the rear brake.
Remove the sprocket securing nut.
Remove the sprocket.
3. Check sprocket wear. Replace if wear
decreases tooth width as shown.
4. Replace if tooth wear shows a pattern
such as that in the illustration. or as
precaution and common sense dictate.
5. During reassembly, make sure the lock
washer splines are properly seated on
the drive shaft splines. Tighten securing
nut to specified torque value. Bend lock
washer tab fully against securing nut
flats.
Drive sprocket securing nut torque:
55 Nm (5.5 m • kg)
-108-
1. Wear limit 3 mm (0.118 in)
2 Correct
3. Roller
1 Slip
-off