Yamaha 1 10 underbone has idle speed in the cold engine, but not in the hot engine. What is the reason?

Hello, several reasons for the unstable idle speed at the start of the cold car:

1, caused by dirty throttle;

2, caused by oxygen sensor failure;

3, water temperature sensor failure;

4. The spark plug is caused by excessive carbon deposition;

Solution:

1, clean the throttle;

2. Detect the fault code with a special automobile computer;

3. Replace the spark plug;

The above steps basically solved the problem of unstable idle speed when the cold car started. Hope to adopt, thank you.