Running a motorcycle with low fuel is not ideal and can potentially lead to several issues. Here are a few reasons why it is generally considered bad to run a motorcycle with low fuel:
Fuel System Problems: When the fuel level is low, there is a higher chance of drawing in air into the fuel system. Air bubbles can disrupt the fuel flow and cause the engine to run poorly or stall. This can lead to difficulty starting the motorcycle or even engine damage in some cases.
Fuel Pump Damage: Many motorcycles have fuel pumps that are submerged in the fuel tank to deliver fuel to the engine. Running the motorcycle with a very low fuel level can cause the pump to suck in air instead of fuel. This can potentially damage the fuel pump, resulting in costly repairs.
Sediment Accumulation: Fuel tanks can accumulate sediment, debris, or rust particles over time. These contaminants settle at the bottom of the tank. When you run the motorcycle with low fuel, you increase the chance of drawing in these particles into the fuel system. This can clog fuel filters, injectors, or carburetors, leading to poor engine performance or even damage.
Overheating: Some motorcycles rely on fuel to cool the fuel pump or injectors. Running with low fuel levels can reduce the cooling effect and potentially cause these components to overheat, leading to malfunctions.
Stranded in a Remote Location: Running out of fuel is an obvious risk when riding with low fuel. It can leave you stranded in a remote or unsafe location, making it difficult to reach a gas station or find help.
To avoid these potential issues, it's best to maintain a reasonable amount of fuel in your motorcycle's tank. It's a good practice to regularly monitor your fuel level and refill before it reaches a critically low point.