Yamaha F200B, Service Manual

Page: 307 / 579

7-48
7
Removing the driven sprocket and
camshaft
When the timing belt is not installed, do
not turn the crankshaft or camshafts. Oth-
erwise, the pistons and valves or intake
and exhaust valves could collide with
each other and be damaged.
1. Align the “
L
L L
L
” mark
a
on the drive
sprocket with the mating surface of the
crankcase and cylinder block by turning
the crankshaft counterclockwise 60°
gradually.
NOTICE: Do not turn the
crankshaft counterclockwise more
than 60°. Otherwise, the piston and
valves could collide with each other
and be damaged.
2. Align the “I” marks
b
on the VCT assem-
bly (PORT) and driven sprocket (PORT)
by turning them clockwise 60° gradually.
NOTICE: Do not turn the VCT assem-
bly (PORT) and driven sprocket
(PORT) clockwise more than 60°, and
do not turn the VCT assembly (STBD)
and driven sprocket (STBD). Other-
wise, the intake and exhaust valves
could collide with each other and be
damaged.
TIP:
Be careful when turning the VCT assemblies
and driven sprockets. Depending on the posi-
tion of the camshafts, the force of the valve
springs may cause the VCT assemblies and
driven sprockets to be rotated too far.
3. Secure the VCT assembly using the spe-
cial service tool
1
, and then remove the
VCT caps
2
. NOTICE: When removing
the VCT cap, do not secure the cam-
shaft. Otherwise, the VCT assembly
could be damaged. When removing
the VCT cap, do not turn the VCT
assembly. Otherwise, the intake and
exhaust valves could collide with
each other and be damaged.
4. Remove the special service tool.
5. Secure the intake camshaft using a
wrench
3 , and then remove the VCT
assemblies 4 . NOTICE: When remov-
ing the VCT assembly, do not turn the
intake camshaft. Otherwise, the intake
and exhaust valves could collide with
each other and be damaged.
POR STBD T
a
PORT
b
PORT
b
PORT
b
Sheave holder 1 : 90890-01701
2
1
2
4
4
3
Camshaft