PIAGGIO Beverly 300 i.e. - Page 22

- Measure the diameter of the valve stems in the
three positions indicated in the diagram.
STANDARD DIAMETER
Specification
Desc./Quantity
Intake: 4.987 - 4.972 mm
Exhaust: 4.975 - 4.960 mm
MINIMUM ADMISSIBLE DIAMETER
Specification
Desc./Quantity
Intake: 4.96 mm
Exhaust: 4.945 mm
- Calculate the clearance between valve and valve guide.
- Check the deviation of the valve stem by resting
it on a «V» shaped support and measuring the ex-
tent of the deformation using a dial gauge.
Characteristic
Limit values admitted:
0.1 mm
Characteristics Beverly 300 i.e.
CHAR - 22