Why does the fuel gauge sometimes not change after refueling?

[DiGriffin]

If you encounter a situation where the fuel gauge needle moves inconsistently, especially when the first half of the scale drops slowly but the second half speeds up significantly, this phenomenon is relatively common. Below is an introduction to fuel gauges: 1. Composition: Pointer-type fuel gauges are divided into combined and standalone types. Combined gauges are more common in step-through motorcycles, integrating fuel level indicators with tachometers, odometers, coolant temperature gauges, and charging current meters into a large instrument cluster. Standalone fuel gauges consist of a single fuel indicator and are more commonly seen in retro-style and cruiser motorcycles. 2. Working principle: When current from the battery XG flows through coils L1, L2, and L3, the magnetic fields generated by these three coils all exert force on the disc-shaped permanent magnet in the pointer instrument head. The magnetic fields generated by coils L1 and L3 are perpendicular to the magnetic field generated by coil L2. 3. Fuel gauge maintenance: Common faults in motorcycle fuel gauges include failure to display fuel levels and inaccurate fuel level readings.