Why is it Important to Clean Rust Out of a Gas Tank in a Motorcycle?

Having experienced the task of cleaning rust out of my XJR1300 motorcycle gas tank twice, I can confirm firsthand the significance of maintaining fuel cleanliness through rust removal. The internal fuel filter within the tank is relatively small and can easily become blocked with rust that has accumulated over time. This can lead to rough engine performance or even complete engine stalling.

Common Causes of Rust Accumulation

Rust tends to form in the gas tank of a motorcycle due to several factors, primarily related to storage conditions. Both prolonged outdoor storage and long-term storage with a partially filled tank can contribute to rust formation. The environmental exposure and moisture present in open-air storage, along with the reduced fuel level leading to increased air exposure, form an ideal breeding ground for rust to take hold. Similarly, long-term storage with a half-empty tank results in a greater surface area for moisture and condensation to accumulate, increasing the likelihood of rust formation.

The Consequences of Ignoring Rust

The ramifications of not addressing rust in the gas tank can be significant, affecting various components of the motorcycle's fuel system. Rust particles can clog every fuel-related component between the tank and the cylinder inlets. This starts with the small filter at the fuel lap, potentially moving on to a larger secondary filter, and ultimately affecting the jets in carburetors or the fuel injectors in an EFI system. A build-up of rust can severely impact the performance and reliability of the motorcycle.

Proactive Measures to Prevent Rust

To prevent rust from forming and clogging up the fuel system, it is crucial to take proactive measures. Here are some key practices:

Tanking Up Full: If you plan to store your motorcycle for an extended period, it is essential to ensure the gas tank is as full as possible. Even if the fuel does go stale, it will minimize the airspace in the tank and reduce the likelihood of condensation and rust. Storage Conditions: If you must store your motorcycle outdoors or in a garage with poor ventilation, consider protective measures such as using a quality sealant on the tank or storing the motorcycle in a controlled environment like a garage or an enclosed storage facility. Regular Inspections: Regularly inspect the gas tank for any signs of rust. This can help catch the problem early, making it easier to clean the rust and prevent further damage.

Historical Treatment Methods for Rust

Historically, there have been recommendations to use small lead weights to clean rust out of the gas tank. The idea was to place the weights in the tank, shake it vigorously to work the rust particles loose, and then the lead coating that forms from the lead weights would remain in place. While this method was once popular, there is no clear evidence that it is still used today with the same efficacy. Modern fuel additives and maintenance practices offer more reliable and effective solutions.

Conclusion

Regularly cleaning rust from a motorcycle gas tank is crucial for maintaining fuel cleanliness and ensuring optimal engine performance. By taking proactive measures such as keeping the tank full during storage, using protective measures, and regularly inspecting the tank, you can significantly reduce the risk of rust formation and associated issues. For those who have experienced the frustration of dealing with rusted tanks, addressing this issue promptly can save considerable time, effort, and potentially expensive repairs down the line.