Yamaha Scorpio - Valve Seats Inspection

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ENG
VALVES AND VALVE SPRINGS
6.Inspect:
●
Spring contact face
Wear/Pitting/Scratches
→
Replace.
7.Measure:
●
Valve guide inside diameter
Out of specification
→
Replace.
YP402010
8.Measure:
Out of specification
→
Replace the valve
guide.
Valve guide inside diameter:
Intake:
6.000 ~ 6.012 mm
<Limit: 6.042 mm>
Exhaust:
6.000 ~ 6.012 mm
<Limit: 6.042 mm>
Stem-to-guide clearance =
Valve guide inside diameter
a
–
Valve stem diameter
Stem-to-guide clearance limit:
Intake:
0.08 mm
Exhaust:
0.1 mm
EB402020
VALVE SEATS INSPECTION
1.Eliminate:
●
Carbon deposits
(from the valve face and valve seat)
2.Inspect:
●
Valve seats
Pitting/wear
→
Reface the valve seat.