59
use and maintenance
Atlantic 125/250/500 Sprint
IDLING ADJUSTMENT
Carefully read page 39 (MAINTENANCE).
Adjust the idling speed every time it is erratic.
To carry out this operation, proceed as
follows.
u
Ride for a few miles until reaching the
normal operating temperature, see
Coolant temperature indicator "
", page
14 (INSTRUMENTS AND INDICATORS
TABLE), then stop the engine.
u
Position the vehicle on the centre stand.
u
Remove the right inspection cover, see
page 57 (REMOVING THE RIGHT AND
LEFT INSPECTION COVERS).
u
Connect an electronic rev counter to the
spark plug cable.
u
Start the engine.
Correct engine rpm reading is about:
–
1600 ± 100 rpm;
N o t e t h a t t h e r e a r w h e e l w i l l b e a t
standstill.
If necessary:
u
Open the helmet compartment under the
seat.
u
Unscrew the screw (1) and remove the
protective cover (2).
u
Turn the adjuster screw (3) on the
carburettor.
u
By SCREWING IT (clockwise), you
increase the engine rpm.
u
By UNSCREWING IT (anticlockwise),
you decrease the engine rpm.
u
Turn the throttle twistgrip, accelerating
and decelerating a few times to make
sure that it operates correctly and to
check if the idling speed is constant.
NOTE
Do not turn the air adjusting
screw to avoid variations of the carburetion
setting.
I f n e c e s s a r y , c o n t a c t y o u r
a p r i l i a
Authorised dealer.
2
1
125
3
125
APRum_ATLANT125#02_##uk.book Page 59 Tuesday, March 14, 2006 5:15 PM
