Haojue Neptune motorcycle is not easy to start in cold weather.

The main problem is the carburetor, which should not be a problem. You can drive with mixed air and turn it off when the temperature of the car comes up. You should cut down on oil. If you don't want to go to so much trouble, there is another solution, which is to take the carburetor apart to raise the oil level. However, the consequence of doing so is to consume oil. It is not recommended to do this, and people and money can't pass.