4 - 30
ENG
VALVES AND VALVE SPRINGS
c. Install the valve into the cylinder head.
d. Turn the valve until the valve face and valve
seat are evenly polished, then clean off all
of the compound.
NOTE:
For best lapping results, lightly tap the valve
seat while rotating the valve back and forth
between your hands.
e. Apply a fine lapping compound to the valve
face and repeat the above steps.
NOTE:
After every lapping operation be sure to clean
off all of the compound from the valve face and
valve seat.
f. Apply Mechanic’s blueing dye (Dykem) to
the valve face.
g. Install the valve into the cylinder head.
h. Press the valve through the valve guide and
onto the valve seat to make a clear pattern.
i. Measure the valve seat width again. If the
valve seat width is out of specification,
reface and relap the valve seat.
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10.Measure:
• valve spring free length
a
Out of specification
→
Replace.
Valve spring free length
Intake
32.63 mm (1.28 in)
<Limit>: 31.0 mm (1.22 in)
Exhaust
36.46 mm (1.44 in)
<Limit>: 34.6 mm (1.36 in)
Summary of Contents for 2004 Rhino 660 YXR660FAS
Page 1: ...LIT 11616 17 23 5UG F8197 10 YXR660FAS SERVICE MANUAL ...
Page 6: ......
Page 40: ...2 11 SPEC ENGINE SPECIFICATIONS Cylinder head tightening sequence ...
Page 55: ...2 26 SPEC COOLANT FLOW DIAGRAMS 1 Coolant outlet hose 2 Radiator inlet pipe 2 1 ...
Page 383: ...9 31 ELEC LIGHTING SYSTEM ...
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Page 420: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN PRINTED IN U S A ...