Beta Motorcycles X Trainer 300 2T 2015 Workshop Manual page 96

3
Reference of all open.
94
7
Intervene on screw 7 for the dynamic adjust-
ment of the escape valve unit, thus modifying
the characteristic curve of the engine.
The positions indicated in the below table are
those considered excellent for engine function-
ing.
Displacement [cm³] adjustment screw (from
300
The "all open" position corresponds to the per-
fect alignment between adjustment screw head
and adjustment cover.
Adjustment must, therefore, be carried out as
follows.
∙ Bring the screw to "all open" position;
∙ Tighten the number of turns indicated in the
table.
The effects obtained from modifying the posi-
tion of the adjustment screw respect to the posi-
tions in the above table, are shown in the table.
clockwise rotation of Anti-clockwise rotation
adjustment screw of adjustment screw
Greater acceleration
Softer flow-rate and
and lower torque at
less over-rev
Attention! Do not tighten the adjustment screw
for more than three and a half turns from the all
open position.
Regulation of
all open)
3 1/2
low speeds