Checking The Cylinder Head - Yamaha F50F Service Manual

3. Measure the camshaft journal diameters
c and d, and cylinder head journal
inside diameter e. Replace the camshaft
and cylinder head if out of specification.
Camshaft journal diameter c:
36.925–36.945 mm
(1.4537–1.4545 in)
Camshaft journal diameter d:
36.935–36.955 mm
(1.4541–1.4549 in)
Cylinder head journal inside
diameter e:
37.000–37.025 mm
(1.4567–1.4577 in)

Checking the cylinder head

1. Eliminate carbon deposits from the com-
bustion chambers and check for deterio-
ration.
2. Check the cylinder head warpage using a
straightedge 1 and thickness gauge 2
in the directions shown. Replace if above
specification.
6C13G11
Cylinder head warpage limit:
0.10 mm (0.0039 in)
Cylinder head
1
2
3
4
5
6
7
8
9
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