APRILIA SCARABEO 500 2008 Service Station Manual page 185

SCARABEO 500
Inspecting the springs and half-cones
- Check that the upper and lower supporting spring
plates, the cotters and the oil seal show no sign of
abnormal wear. Otherwise, replace the compo-
nent.
- Measure the unloaded spring length.
Characteristic
Standard length:
44.4 mm
Limit allowed after use:
42.4 mm
Refitting the valves
- Place the valve spring supporting plates on the
head.
- Fit the 4 oil seals alternately with the specific tool.
- Lubricate the oil seals and the valve guides.
Specific tooling
020306Y Punch for fitting valve sealing rings
- Fit the valves, the springs and the plates. Using
the specified tool with the appropriate adaptor,
compress the springs and insert the cotters in their
seats.
Specific tooling
020382Y Tool for removing valve cotters fitted
with part 012
020382Y012 bushing (valve removing tool)
NOTE
Engine
ENG - 185