Ducati MONSTER620 Manuel D'utilisation Et Entretien page 126

Throttle cable adjustment
The throttle twistgrip must have a free play of 2 - 4 mm,
measured at the edge of the twistgrip and at all positions
of the handlebars. If it needs adjusting, use the suitable
adjuster (1, fig. 46) provided on the throttle control.
2 ÷ 4 mm
➤
1
fig. 46
E
49