Assembling The Cylinder Head - Yamaha F30A Service Manual

Cam lobe height a:
Intake and exhaust:
30.834–31.034 mm
(1.2139–1.2218 in)
Cam lobe width b:
Intake and exhaust:
25.900–26.100 mm
(1.0197–1.0276 in)
2. Measure the camshaft runout. Replace if
above specification.
Camshaft runout limit:
0.03 mm (0.0012 in)
3. Measure the camshaft journal diameters
c and d, and the cylinder head journal
inside diameters e. Replace the cam-
shaft, cylinder head, or both if out of
specification.
d
c
c
e
67C3K11
S67C5101
e
e
S67C5102
Camshaft journal diameter c:
36.935–36.955 mm
(1.4541–1.4549 in)
Camshaft journal diameter d:
36.925–36.945 mm
(1.4537–1.4545 in)
Cylinder head journal inside
diameter e:
37.000–37.025 mm
(1.4567–1.4577 in)
4. Check the automatic decompression
actuators. Replace the camshaft if dam-
aged or worn. (M and W model)

Assembling the cylinder head

1. Install a new valve seal 1 onto the valve
guide.
1
Cylinder head
1
2
3
4
5
S67C5103
6
E
7
8
S67C5104
9
5-36