VESPA LX 125 4T Euro 3, Руководство по обслуживанию станции, Страница: 105 / 180

- If the width of the impression on the valve seat or
the diameter of the valve guide exceed the speci-
fied limits, replace the cylinder head.
- Check width of the impression on the valve seat
« V »
Characteristic
Wear limits:
Max. 1.6 mm.
Inspecting the valves
- Measure the diameter of the valve stems in the
three positions indicated in the diagram.
- Calculate the clearance between valve and valve
guide.
Characteristic
Minimum diameter admitted - Intake:
4.96 mm
Minimum diameter admitted - Exhaust:
4.95 mm
Standard clearance - Intake:
0.013 - 0.040 mm
Standard clearance - Exhaust:
0.025 - 0.052 mm
Maximum clearance admitted- Intake:
0.062 mm
Maximum clearance admitted - Exhaust:
0.072 mm
- Check that there are no signs of wear on the
contact surface with the articulated register termi-
nal.
- If the sealing surface on the valves is wider than
the specified limit, damaged in one or more points
or curved, replace the valve with a new one.
Characteristic
Standard valve length - Intake:
80.6 mm
Valve standard length: Exhaust
Vespa LX 125 - 150 4T Euro 3
Engine
ENG - 105