APRILIA ATLANTIC 125 Workshop Manual page 90

FUEL SYSTEM
•
Make sure that the membrane is not broken or
hardened. If this is the case, change it.
•
Refit the tapered metering rod on the vacuum valve.
•
Make sure that the spring is correctly positioned on the
metering rod and that coupling is perfectly seated.
•
To fit the coupling, turn it by 1/8
•
Refit the vacuum valve on the carburetor. Make sure
that the tapered metering rod seats into the spray
nozzle.
•
To time vacuum valve rotation, insert membrane end
into its location. The membrane is correctly fitted to the
valve when vacuum main feeding hole is
position with the choke tube, on the throttle side (see
figure).
•
Refit spring onto valve.
•
To refit vacuum chamber cover, make sure that the
reference on cover matches with that on the
membrane.
•
Tighten screws to the specified torque.
•
Check for cut-off valve proper positioning, for 200 cc
version only. Check that the membrane is not broken
or hardened. Check spring free length.
Standard length: 24 mm
•
Refit membrane with the metal pin on valve. Refit
spring and cover. Make sure that cover vacuum port is
facing upwards.
•
Wash and blow starter mount.
•
Refit a new seal on carburetor body and tighten the
two fastening screws.
4 - 18
th
of a turn.
in axial
ATLANTIC 125 - 200