Checking The Valve Springs - Yamaha XV16AL Service Manual

VALVES AND VALVE SPRINGS
g. Apply Mechanic's blueing dye (Dykem)
b onto the valve face.
h. Install the valve into the cylinder head.
i. Press the valve through the valve guide
and onto the valve seat to make a clear
impression.
j. Measure the valve seat width again. If
the valve seat width is out of specifica-
tion, reface and lap the valve seat.
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EAS00241

CHECKING THE VALVE SPRINGS

The following procedure applies to all of
the valve springs.
1. Measure:
• valve spring free length a
Out of specification → Replace the valve
spring.
5 - 50
ENG
Valve spring free length (intake
and exhaust)
Inner valve spring
38.26 mm (1.51 in)
<Limit>: 36.26 mm (1.43 in)
Outer valve spring
43.25 mm (1.70 in)
<Limit>: 41.26 mm (1.62 in)
5