Yamaha 55DEHD - Intake Manifold; Removing the Reed Valve Assembly; Checking the Reed Valve

6885J11
5-14
9
8
7
6
5
4
3
2
1
Intake manifold
Removing the reed valve assembly
1. Remove the intake manifold bolts 1, and
then remove the intake manifold 2.
2. Remove the reed valve assembly 3,
gasket 4, plate 5 and gasket 6.
Checking the reed valve
1. Check the reed valves for bends a.
Replace the reed valve assembly if above
specification.
3
4
5
6
68850180
1
2
68850170
å 75A
∫ 55D, 85A
2. Measure the reed valve stopper height
b. Replace the reed valve assembly if
out of specification.
å 75A
∫ 55D, 85A
Valve bend limit a:
0.2 mm (0.0079 in)
a
a
∫
68850200
a
a
å
68850190
b
b
∫
68850220
b
b
å
68850210
Valve stopper height b:
75A: 2.8–3.2 mm
(0.11–0.13 in)
55D, 85A: 9.7–10.1 mm
(0.38–0.40 in)
6885J11_05 07.9.26 15:44 Page 17