Yamaha F50D Servise Manual page 171

Camshaft and valve
4
5
No Part name
1 Rocker arm
2 Rocker arm shaft
3 Cylinder head
4 Exhaust valve
5 Intake valve
6 Camshaft
7 Valve cotter
8 Spring retainer
9 Valve spring
10 Spring seat
11 Valve seal
12 Circlip
13 Valve guide
14 Retaining bolt
15 Gasket
16 Oil seal
17 Bolt
16
14
15
12
13
12
13
3
6
Q'ty
Cylinder head / Camshaft and valve
13.5 N·m (1.4 kgf·m, 10.0 ft·lb)
1
8
9
10
11
22
7
23
22
7
8
9
10
11
17
18
20
2 19
21
20
17
19
17
18
8
1
1
4
4
1
16
8
8
8
8
8
8
1
1
1
M8 × 22 mm
5
23
1
20
a
b
21
17
c
d
e
f
19
Remarks
7-30
0
1
2
3
4
5
6
7
8
9
10
A