Yamaha F50F Service Manual page 96

POWR
7. Check the intake valve clearance for cyl-
inders #3 and #4, and the exhaust valve
clearance for cylinders #2 and #4. Adjust
if out of specification.
EX
#1
#2
#3
#4
d
NOTE:
Check the valve clearance when the engine
is cold.
Valve clearance (cold):
Intake d:
0.20 ± 0.05 mm
(0.008 ± 0.002 in)
Exhaust e:
0.30 ± 0.05 mm
(0.012 ± 0.002 in)
8. Loosen the rocker arm locknut 5, and
then turn the adjusting screw 6 until the
specified valve clearance is obtained.
6 5
5-5
Power unit
IN
e
S6C15150
S6C15160
NOTE:
• To decrease the valve clearance, turn the
adjusting screw clockwise.
• To increase the valve clearance, turn the
adjusting screw counterclockwise.
9. Tighten the rocker arm locknut to the
specified torque, and then check the
valve clearance again. Adjust if neces-
sary.
Rocker arm locknut 5:
14 N·m (1.4 kgf·m, 10.3 ft·lb)
10. Install the cylinder head cover, fuel
pump, fuel filter, spark plugs, spark plug
caps, blowby hose, and flywheel magnet
cover.
6C13G11