Checking The Valve Clearance - Yamaha F50F Service Manual

Relief valve opening pressure
(reference data):
350–450 kPa
(3.5–4.5 kgf/cm

Checking the valve clearance

CAUTION:
Do not turn the flywheel magnet counter-
clockwise, otherwise the valve system
may be damaged.
1. Remove the flywheel magnet cover, and
then remove the blowby hose 1.
2. Remove the fuel pump 2 and fuel filter
3.
3. Disconnect the spark plug caps and
remove the spark plugs and cylinder
head cover 4.
4
4. Turn the flywheel magnet clockwise and
align the " 1" mark a on the driven
sprocket with the " " mark b on the cyl-
inder head.
6C13G11
2
, 50.8–62.3 psi)
1
3
2
S6C15130
5. Check the intake valve clearance for cyl-
inders #1 and #2, and the exhaust valve
clearance for cylinders #1 and #3. Adjust
if out of specification.
6. Turn the flywheel magnet clockwise and
align the " 4" mark c on the driven
sprocket with the " " mark b on the cyl-
inder head.
Power unit
c
1
a
b
2
3
S6C15140
4
5
6
7
8
9
5-4