Checking The Valve Spring; Checking The Rocker Arm And Rocker Shaft - Yamaha F40BMHD Service Manual

POWR
a
CYLINDER HEAD
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a
b

CHECKING THE VALVE SPRING

1. Measure:
• Free length
Out of specification → Replace.
Free length limit
37 .85 - 39.85 mm
(1.491 - 1.569 in)
2. Measure:
• Tilt valve
Out of specification → Replace.
Tilt limit
IN, EX 1.7 mm (0.07 in)
CHECKING THE ROCKER ARM AND
ROCKER SHAFT
1. Check:
• Rocker arm
Pitting/wear → Replace.
2. Measure:
• Rocker arm inside diameter
• Rocker shaft outside diameter
Out of specification → Replace.
Rocker arm inside diameter
16.000 - 16.018 mm
(0.6299 - 0.6303 in)
Rocker shaft outside diameter
15.971 - 15.991 mm
(0.6288 - 0.6296 in)
5-32
a
a
a
E
b
a
b