Yamaha F115 AETL [250/709] Valves

Yamaha LF115Y [250/709] Valves
5-28
POWR
E
VALVES
CHECKING THE VALVE 5
1. Check:
Valve
Damage/warpage Replace.
2. Measure:
Margin thickness a
Out of specification Replace.
Margin thickness
IN: 0.8 - 1.2 mm
(0.031 - 0.047 in)
EX: 1.0 - 1.4 mm
(0.039 - 0.055 in)
a
5300
3. Measure:
Valve stem diameter a
Out of specification Replace.
Valve stem diameter
IN: 5.975 - 5.990 mm
(0.2352 - 0.2358 in)
EX: 5.960 - 5.975 mm
(0.2346 - 0.2352 in)
a
5310
4. Measure:
Valve stem runout
Out of specification Replace.
NOTE:
The valve guide, valve seal, and valve
should be replaced as a set.
Valve stem runout limit
IN and EX
0.03 mm (0.001 in)
5320

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