BOMBARDIER 1996 Ski-doo MX Z440 Handbook page 167

7. Turn the air screw left and right (between 1/4 and 1/2 turn) and select the position where the
engine revolution reaches the maximum. Adjust the throttle stop screw to bring down the
engine revolution to your target speed for idling. After this adjustment of the throttle stop screw
is made, select once more the position where the engine revolution reaches the maximum, by
turning the air screw left and right (between 1 / 4 and 1 / 2 alternately). At this point, attention
should be paid to the fol lowing points.
can be obtained (for instance, the number of revolutions does not change in the range of
1-1 / 2 to 2.0 turns), it would be better for acceleration to 1-1 / 2 turns.
Excessive tightening of the air screw would damage the seat. The position where the air
screw comes to a stop should be considered the "fully closed" position. The maximum
number of turns in the opening of the air screw must be limited to 3.0. If the air screw is
opened over 3.0 turns, the spring will not work and the air screw can come off during
operation of the vehicle.
Section ENGINE PREPARATION
04
04-65