Valve Seats Inspection - Yamaha Scorpio Service Manual

VALVES AND VALVE SPRINGS
6.Inspect:
Spring contact face
G
Wear/Pitting/Scratches → Replace.
7.Measure:
Valve guide inside diameter
G
Out of specification → Replace.
YP402010
8.Measure:
Out of specification → Replace the valve
guide.
EB402020

VALVE SEATS INSPECTION

1.Eliminate:
Carbon deposits
G
(from the valve face and valve seat)
2.Inspect:
Valve seats
G
Pitting/wear → Reface the valve seat.
4 - 25
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
ENG