Check the throttle position: with the accelerator pedal fully depressed (this should be done by an assistant), it should be fully open, and with the accelerator pedal released, it should be fully closed
Otherwise, the actuator needs to be adjusted
For visual inspection, remove the air filter (see "Removing and installing the air filter").
Remove the spring retainer from the slot of the cable tip and move the tip forward in the hole of the rubber damper until the damper closes completely.
If the throttle is not fully open, move the end of the cable back until the throttle is fully opened.
Fix the end of the cable in its new position by inserting the clip into its corresponding slot.
If the throttle actuator adjustment fails to fully open or close the throttle, or if the actuator sticks, replace the throttle cable.
Reinstall the air filter.
Replacing the throttle cable
Disconnect the throttle cable from the accelerator pedal.
Remove the air filter.
Disconnect the end of the cable from the intermediate lever.
Squeeze the damper latches and remove the damper from the hole in the eye.
Having prying with a screwdriver, remove the stop of the cable sheath from the shield of the engine compartment, remove the throttle cable by pulling it into the engine compartment
Install the new cable in the reverse order of removal.
Adjust throttle actuator if necessary