Yamaha F75F - Assembling the Cylinder Head; Checking the Camshaft

Camshaft and valve
7-38
Checking the camshaft
1. Measure:
• Lobe height “a”
Below specification  Replace.
2. Measure:
• Runout
Above specification  Re
place.
3. Measure:
• Camshaft
journal diameters “a” and cylin-
der head journal inside diameters “b”
Out of specification  Replace.
Assembling the cylinder head
1. Install:
• Valve stem
seal
Rocker arm
Inside diameter IN
21.000–21.018 mm (0.8268–
0.8275 in)
Inside diameter EX
21.000–21.018 mm (0.8268–
0.8275 in)
Rocker arm shaft
Outside diameter IN
20.971–20.991 mm (0.8256–
0.8264 in)
Outside diameter EX
20.971–20.991 mm (0.8256–
0.8264 in)
Cam lobe height IN
30.439–30.539 mm (1.1984–
1.2023 in)
Limit
30.389 mm (1.1964 in)
Cam lobe height EX
30.397–30.497 mm (1.1967–
1.2007 in)
Limit
30.347 mm (1.1948 in)
a
Runout
0.030 mm (0.0012 in)
Camshaft
Journal diameter
36.923–36.943 mm (1.4537–
1.4544 in)
Cylinder head
Journal inside diameter
37.000–37.025 mm (1.4567–
1.4577 in)
b
a
a
a
a
a
b
b
b
b
New