APRILIA Atlantic 300 Service Station Manual page 28

Characteristics
- Check the concentricity of the valve head by
placing a dial gauge at right angles to the valve
head and rotating it on the «V» shaped support.
Characteristic
Limit allowed:
0.03 mm
Measure the valve guides.
Characteristic
Valve guide:
5+0.012 mm
- After measuring the valve guide diameter and the
valve stem diameter, check the clearance be-
tween guide and stem.
Specification
Standard clearance:
Limit allowed:
Specification
Standard clearance:
Limit allowed:
- Check that there are no signs of wear on the faying surface with the set screw articulated terminal.
CHAR - 28
INTAKE
EXHAUST
ATLANTIC 300 i.e.
Desc./Quantity
0.013 ÷ 0.04 mm
0.08 mm
Desc./Quantity
0.025 - 0.052 mm
0.09 mm