Yamaha F50A Service Manual page 84

CHK
ADJ
6. Check that the "1" mark a on the driven
sprocket is aligned with the " " mark b
on the cylinder head, and that the " "
mark c on the drive sprocket is aligned
with the " " mark d on the crankcase.
Align if necessary.
CAUTION:
Do not turn the sprockets counterclock-
wise, otherwise the valve system may be
damaged.
7. While pushing against the tensioner side
of the belt, install the new timing belt from
the drive sprocket side with its part num-
ber in the upright position.
3-9
Periodic checks and adjustments
CAUTION:
• Do not twist, turn inside out, or bend the
timing belt beyond the maximum limit of
25 mm (1.0 in) e, otherwise it may be
damaged.
• Do not get oil or grease on the timing
belt.
8. Install the tensioner and bolts, and then
tighten the bolts finger tight.
9. Turn the drive sprocket clockwise two
turns, and then check that the alignment
marks are aligned.
CAUTION:
Do not turn the sprockets counterclock-
wise, otherwise the valve system may be
damaged.
10. Tighten the tensioner bolts to the speci-
fied torque.
Tensioner bolt:
8 N·m (0.8 kgf·m, 5.8 ft·lb)
Tensioner bolt (adjusting bolt):
25 N·m (2.5 kgf·m, 18 ft·lb)
11. Install the blowby hose bolts, stator base
with both collars and stator, and then
connect the couplers.
Stator base screw:
4 N·m (0.4 kgf·m, 2.9 ft·lb)
12. Install the Woodruff key.
62Y3A11