Examination
Disconnect the throttle switch connector.
Connect an ohmmeter to the throttle switch contacts -2- and -18-. Set value: 0 ohm.
Give throttle lever a little gas. The click of the switch should be heard and the resistance should change indefinitely.
Connect an ohmmeter to the throttle switch contacts -3- and -18-. Set value: 0 ohm.
Give the throttle lever full throttle. The click of the switch should be heard and the resistance should drop to zero.
Adjustment
Loosen the fixing screws (arrows), without turning away.
Turn the switch so that when the throttle is closed, the resistance is about 0 ohms.
With a slight opening of the throttle, the resistance should change to infinity.
When released, the resistance value should drop back to 0 ohms.
Replacement
Disconnect the three pin connector.
Loosen the fixing screws (arrows) and remove the switch from the throttle shaft.
Put the throttle switch on the axle. adjust it and tighten the screws.
Connect the three pin connector.