What are the reasons for the decrease in fuel after leaving a motorcycle parked for a few days?

[LaBentley]

Motorcycle parked for a few days with fuel decrease mainly due to the following reasons: Fuel Quality: If the gasoline itself has unsaturated components, when stationary, the higher-density gasoline will sink, while the lower-density gasoline remains on the upper layer. This can cause incorrect float readings. When the motorcycle is driven for a while, the multi-density gasoline mixes again, and the buoyancy changes accordingly. Float Contaminated with Impurities: Although modern gasoline is of good quality, it can still contain impurities. Over time, some impurities may adhere to the float. Float Movement Not Smooth: This possibility is low but can still occur. Wiring Issues: If there is a problem with a part of the connecting circuit, it can lead to incorrect fuel level readings. Fuel Tank Leakage: If the fuel actually decreases, it may be due to a leak in the fuel tank or fuel line. Typically, the fuel line may crack due to poor installation, or the clips may not be secured properly, leading to fuel leakage. In such cases, a gasoline smell may be noticeable.