Adjusting The Throttle Control - APRILIA Atlantic 500 Workshop Manual

Periodic Maintenance Operations
• Energetically blow some air, in order to prevent
the removed residues from getting into the engine.
If the spark plug has crackings on the insulating
material, corroded electrodes or excessive depos-
its, it must be changed.
• Check the spark plug gap with a thickness gauge.
The gap must be 0.7 – 0.8 mm (0.027 - 0.031 in);
if necessary adjust it, carefully bending the earth
electrode.
• Make sure that the washer is in good conditions.
With the washer on, screw the spark plug by hand
in order not to damage the thread.
• Tighten the spark plug by 1/2 turn as to compress
the washer, using the spanner found in the tool kit.
Spark plug driving torque:
12 - 14 Nm (1.2 - 1.4 kgm).
CAUTION
The spark plug must be well tightened, otherwise
the engine may overheat and be seriously dam-
aged. Use the recommended type of spark plug
only, see TECHNICAL DATA, in order not to com-
promise the life and performance of the engine.
• Correctly fit the spark plug to prevent it from
disconnecting due to the engine vibrations.
• Refit the left inspection cover, see (REMOVING
THE RIGHT AND LEFT INSPECTION COVERS).
ADJUSTING
THE THROTTLE CONTROL
Read through the paragraphs MAINTENANCE.
The idle stroke of the throttle grip must be 2 - 3 mm
(0.078 - 0.118 in), measured on the edge of the grip
itself.
If this is not the case, proceed as follows:
• Position the vehicle on the centre stand.
• Withdraw the protection element (1).
• Loosen the lock nut (2).
• Rotate the adjuster (3) in such a way as to restore
the prescribed value.
• After the adjustment, tighten the lock nut (2) and
check the idle stroke again.
• Put back the protection element (1).
• Cable (4) opens the throttle
• Cable (5) closes the throttle.
WARNING
After the adjustment, make sure that the rotation
of the handlebar does not modify the engine idling
rpm and that the throttle grip returns smoothly
and automatically to its original position after
being released.
2-10
Release 00 2002-09
0.7 – 0.8 mm
0,7-0,8 mm
(0.027 - 0.031 in)
(0.027-0.031 in)
Standard
Spark plug
- Alternatively
Spark plug gap
3
1
Atlantic 500
CHAMPION RG6YC
NGK - CR7EKB
0.7 - 0.8 mm
(0.027 - 0.031 in)
4
5
2
chap. 2