Yamaha F15MHX Manuel D'entretien page 234

POWR
a
CAMSHAFT AND VALVES
b
5. Measure:
9 Valve stem runout
Out of specification → Replace the
valve.
Valve stem runout limit:
0.016 mm (0.0006 in)
NOTE:
When replacing the valve, always use a
new valve guide and valve seal.
Valve spring inspection
1. Measure:
9 Valve spring free length a
Out of specification → Replace the
valve spring.
Valve spring free length limit:
32.7 mm (1.29 in)
2. Measure:
9 Valve spring tilt b
Out of specification → Replace the
valve spring.
Valve spring tilt limit:
1.5 mm (0.06 in)
Rocker arm and rocker arm shaft inspection
1. Measure:
9 Rocker arm inside diameter a
9 Rocker arm shaft outside diameter b
Out of specification → Replace the
defective part(s).
Rocker arm inside diameter:
13.000 ~13.018 mm
(0.5118 ~ 0.5125 in)
Rocker arm shaft outside diameter:
12.941 ~ 12.951 mm
(0.5095 ~ 0.5099 in)
5-26
E