Contents: Removal ↡ Installation ↡
Note: Depending on the carburetor version, 2 different idle code shut-off valves are installed. While the CDT carburetor from 07.80 has the shut-off valve screwed into the float chamber under the carburetor, the CDTU carburetor up to 06.80 has it on top of the intake pipe, behind the carburetor. In order to replace the valve, there is no need to remove the carburetor. In the CDT carburetor, install valves with the code designation 0.231 only.
Removal
Remove the air filter.
Disconnect the electrical wire from the shut-off valve.
Remove the safety cuff.
Loosen the lock nut (59) and unscrew the valve. Do not unscrew the nut.
Installation
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Replace defective sealing rings (see arrows).
Screw the idle shut-off valve in until it locks. If using a new valve, screw the lock nut into the same place as on the old one.
Caution: If the lock nut has been unscrewed by mistake, unscrew the float chamber and remove it together with the nozzle holder and pressure spring. Screw the valve into the float chamber until it enters the chamber by 25±0.5 mm. Push the nozzle holder onto the valve, insert the pressure spring and screw in the float chamber with a new gasket. When installing, pre-lubricate the bolts with sealant and do not tighten too much.
Insert the electrical wire.
Adjust idle speed and CO content.
Tighten the lock nut.
Install the air filter.