Malaguti DRAKON125 2022 Workshop Manual page 157

3. Basic parameters
Spark plug model: CR9E(NGK);
There is a resistance of 3-6kΩ inside the spark plug
4. Possible failures
Serious carbon deposition on spark plug;
The spark plug electrode is ablated;
The spark plug insulator is broken;
The spark plug is overheated;
The spark plug leaks