Yamaha F75F - Checking the Cylinder Head; Disassembling the Cylinder Head

Camshaft and valve
7-31
Disassembling the cylinder head
1. Loosen:
• Valve adjusting locknut
• Adj
usting screw
a. Loosen the valve adjusting locknuts
and adjusting screws on cylinders #2
(EX) “a”,
#3 (IN) “b”, and #4 (EX “c”
and IN “d”).
2. Remove:
• Rocker arm shaft bolt
• Washer
• Stopper
• Tensioner
• Rocker arm shaft
• Washer
• Rocker arm
Make sure to keep the parts in the order of re-
moval.
3. Remove:
• Valve cotter
• Retainer
• Valve spring
• Valve spring seat
• Inta
ke valve
• Exhaust valve
Make sure to keep the parts in the order of re-
moval.
Checking the cylinder head
1. Check:
• Cylinder he
ad
Damage/scratches  Replace.
• Cylinder he
ad warpage
Out of specification  Replace.
a. Remove carbon deposits from the
combustion
chambers, and then
check the cylinder head for damage
and scratches.
a
a
c
c
b
b
d
d
#1
#2
#3
#4
EX
IN
Valve spring compressor “1”
(commercially available)
Warpage limit
0.10 mm (0.0039 in)
1