Yamaha F115A - Checking the Camshaft; Installing the Camshaft

5-22
POWR
E
CAMSHAFTS
CHECKING THE CAMSHAFT 5
1. Measure:
• Camshaft lobe dimensions a and b
Out of specification → Replace the
camshaft.
2. Measure:
• Camshaft journal diameter a
• Camshaft cap inside diameter b
Out of specification → Replace the
camshaft or cylinder head.
Camshaft lobe dimension
a IN: 37.22 - 37.38 mm
(1.465 - 1.472 in)
b IN: 29.92 - 30.08 mm
(1.178 - 1.184 in)
a EX: 36.90 - 37.06 mm
(1.453 - 1.459 in)
b EX: 29.92 - 30.08 mm
(1.178 - 1.184 in)
Camshaft journal diameter
a: 24.96 - 24.98 mm
(0.9827 - 0.9835 in)
Camshaft cap inside diameter
b: 25.000 - 25.021 mm
(0.984 - 0.985 in)
5240
b
b
a
5250
INSTALLING THE CAMSHAFT 5
Install:
• Camshaft
• Camshaft cap
Installation steps
(1) Before installing the exhaust and
intake camshafts, turn the crankshaft
until cylinder #1’s piston is at TDC on
the compression stroke.
(2) Install the camshaft caps in the proper
position as shown and with the
stamped numbers facing upside down.
5
1
5
4
3
2
10
9
8
7
1
6
1
2
3
4
5
6
7
8
9
10
5260