Inspecting The Valve Stem Guide Clearance; Inlet; Outlet - Gilera Nexus 500 Workshop Manual

Nexus 500
- 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.
Specification
Standard clearance:
Admissible limit:
Specification
Standard clearance:
Admissible limit:

INLET

OUTLET

0.025 ÷ 0.052 mm
Desc./Quantity
0.013 - 0.04 mm
0.08 mm
Desc./Quantity
0.09 mm
ENG - 143
Engine