PIAGGIO MP3 400 i.e. - Inspecting the Valve Stem Guide Clearance; Minimum Admissible Diameter

MINIMUM ADMISSIBLE DIAMETER
Specification Desc./Quantity
Inlet: 4.96 mm
Outlet: 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 abutment and measuring the
extent of the deformation with a comparator.
Characteristic
Limit values admitted:
0.1 mm
- Check the concentricity of the valve head by ar-
ranging a comparator at right angle relative to the
valve head and rotate it on a "V" shaped abutment.
Characteristic
Admissible limit:
0.03 mm
Inspecting the valve stem guide clearance
- After measuring the valve guide diameter and the valve stem diameter, check the clearance between
guide and stem.
Engine MP3 400 i.e.
ENG - 64