Rajan Wilcox
The fuel tank on a motorcycle is usually located directly over the engine, making fuel routing simpler. This is particularly important because the limited space on a motorcycle means the tank is often an odd shape, and because motorcycles lean more than cars, the fuel has to flow well in a greater variety of situations. The location of the fuel tank also helps with balance, as placing it near the centre of mass makes the bike handle similarly whether it's empty or full. The fuel tank is also usually easy to access for refuelling, and it's in a good place to avoid rupturing in accidents.
| Characteristics | Values |
|---|---|
| Location | Directly over the engine |
| Ease of access | Easy to remove |
| Safety | Located to avoid rupturing in accidents |
| Balance | Important to maintain balance and vehicle control |
| Space | Limited space means tank is odd shape |
| Fuel routing | Simple, with fuel flowing in a variety of situations |
| Refuelling | Easy to access for refuelling |
| Cleaning | Requires complete cleaning of the bike |
| Servicing | Hard-to-access parts of the engine might need servicing |
| Refurbishing | Tank might need refurbishing |
| Replacement | Tank might need to be replaced |
| Capacity | Larger capacity tanks available for greater riding distance |
| Durability | Made with POLYETHYLENE CROSSLINK for extra strength and durability |
| Back-up fuel | Some bikes have five or six-gallon tanks as a reserve |
| Auxiliary fuel systems | Rotopax, MSR, SW-Motech, Twisted Throttle, and Acerbis make fuel canisters |
| Fuel bladders | MSR Dromedary Bladders are inexpensive, versatile, and can be stuffed into side bags |
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What You'll Learn
Why is the fuel tank in front of the motorcycle?
The fuel tank on a motorcycle is usually located in front, directly over the engine. This is because the fuel tank is easier to access for refueling when placed in the front. Additionally, the front is the best place for the tank to avoid rupturing in the event of an accident. In many accidents, the front or back wheels would be struck first, and the current placement of the fuel tank is ideal for preventing rupture.
Another reason for the front placement is to maintain balance and vehicle control. Placing the fuel tank over the engine keeps the variable weight close to the center of mass of the bike. This makes the bike handle more predictably when empty or full. Furthermore, limited space on a motorcycle often results in an oddly shaped fuel tank, and the front position allows for better fuel flow as motorcycles lean more than cars.
The location of the fuel tank also simplifies fuel routing. It is cheaper and easier to deliver fuel from the tank to the engine when they are close together, especially when trying to minimize size and weight. Overall, the front placement of the fuel tank on a motorcycle considers factors such as accessibility, safety, balance, and fuel delivery efficiency.
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How to remove a motorcycle's fuel tank
Removing a motorcycle's fuel tank is a necessary step for many repairs and can be done by following these steps:
First, secure your motorcycle on stable and level ground to prevent it from tipping over during the process. Next, remove the fuel from the tank by running it down or siphoning it out. This step is important for safety and ease of removal. If you wish to skip this step, you can turn off the fuel lever if your tank has an OFF position. Alternatively, if it's a vacuum petcock, you can leave it on unless it's defective.
Now, remove any fairings or tank straps that are in the way. Then, disconnect the main fuse for safety, using the service manual to locate the fuse box. Disconnect the fuel pump and clear the gas lines by unplugging the connector for the fuel pump, which may be located under the seat, tank, or on the sides. With the fuel pump unplugged, turn on the motorcycle and hold the start button for a few seconds to run the remaining fuel through the system and into the engine.
Once done, remove the key and reconnect the fuel pump. Locate and disconnect the fuel line that links to the tank, which is commonly done with a quick-connect hose fitting. Remove any attachments or consoles that keep the tank tied to the motorcycle, such as vent or overflow tubes. Finally, remove the tank bolts at the front and rear of the unit, and carefully lift and remove the tank.
It's important to note that each motorcycle is unique, and some steps may vary or require adjustments. Always have the service manual for your specific motorcycle on hand for reference.
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The ease of removing a motorcycle fuel tank vs. a car's
Removing a motorcycle's fuel tank is generally considered easier than removing a car's fuel tank. The location of the fuel tank in a car, usually underneath the rear seats and/or trunk, makes the process complicated and time-consuming. On the other hand, a motorcycle's fuel tank is typically positioned on top, making it more accessible and straightforward to remove.
The process of removing a motorcycle's fuel tank can be summarised as follows: firstly, ensure the motorcycle is securely positioned to prevent any accidental tip-over. Next, drain the fuel from the tank, either by running it down or siphoning it out. Some suggest using a compressor hose to force out the fuel vapours after heating the tank lightly without an open flame. It is crucial to perform this step in a well-ventilated area to avoid inhaling harmful fumes. Once the tank is empty, remove any fairings or bolts that may interfere with the process. Then, carefully lift the rear of the tank, detach the front lugs from the rubber tank mounts, and undo any remaining bolts at the rear. Finally, place the tank on the ground and secure it.
While the process may vary slightly depending on the motorcycle's make and model, it is generally agreed that removing a motorcycle fuel tank is a relatively simple task. However, it is essential to approach it with caution, as mistakes can occur, and safety should always be a priority.
In contrast, removing a car's fuel tank is often considered a last resort when resolving fuel issues. The tank's location beneath the rear seats or trunk demands patience and, in some cases, contortionist-like manoeuvres to access it. The process can be cumbersome and time-consuming, requiring the removal of multiple components before accessing the fuel tank itself.
In summary, the ease of removing a motorcycle fuel tank versus a car's fuel tank leans in favour of motorcycles due to their more accessible tank placement and generally simpler removal process. However, it is important to approach any fuel tank removal with caution and follow the necessary safety precautions.
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Auxiliary fuel tanks for motorcycles
The fuel tank on a motorcycle is usually located in front, directly over the engine, for several reasons. Firstly, it simplifies fuel routing due to limited space and the need for an odd-shaped tank. Secondly, it ensures better fuel flow as motorcycles lean more than cars. Additionally, the front placement facilitates easier refuelling and enhances safety by reducing the risk of tank rupture during accidents. Lastly, it contributes to better balance by keeping the weight closer to the centre of mass of the bike.
While the front placement offers several advantages, some motorcycle owners may consider adding auxiliary fuel tanks to extend their range. Kinetic Motorcycles offers an auxiliary gas tank kit that allows riders to build their own tank setup based on their specific needs. The kit provides multiple options, and the tank can be customised to yield different ranges. For instance, a 5-liter tank can provide an extended range of 60-70 miles, while a 3-liter tank can offer a range of 45-55 miles.
These auxiliary fuel tanks are designed to provide peace of mind and avoid situations where riders might find themselves stranded. They offer a convenient solution for those occasions when riders might have pushed their luck a little too far. Additionally, these tanks can be customised with features like engraved heat shields, adding a personal touch to the functionality they provide.
While the primary fuel tank on a motorcycle is typically located in front, auxiliary fuel tanks offer riders the flexibility to customise their fuel capacity according to their specific needs. These additional tanks can be tailored to provide extended ranges, ensuring that riders can confidently embark on longer journeys without worrying about refuelling frequently. The ability to build a custom tank setup makes auxiliary fuel tanks a valuable option for motorcycle enthusiasts seeking greater fuel capacity and peace of mind on the road.
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The best placement to avoid ruptures in accidents
The placement of the fuel tank on a motorcycle is a crucial factor in ensuring the rider's safety in the event of accidents. While several factors influence the location of the fuel tank, such as balance and ease of refueling, the primary concern is to minimise the risk of ruptures and subsequent fires.
The ideal placement of the fuel tank on a motorcycle is directly over the engine at the front. This location offers several advantages in terms of accident safety. Firstly, by positioning the tank at the front, it is less likely to be struck and ruptured in accidents where the front or rear wheels are impacted first, which are the most common types of collisions. This placement principle aligns with the findings of the April 1968 Journal of the Society of Automotive Engineers, which recommended placing the fuel tank away from areas of high probability of damage and rupture, such as above the rear axle in cars, to minimise fire hazards.
Additionally, the front placement of the fuel tank on a motorcycle contributes to better balance and handling. The fuel weight is centred and close to the bike's centre of mass, ensuring consistent handling characteristics regardless of the fuel level. This balanced design improves rider control and stability, reducing the risk of accidents and subsequent ruptures.
To further enhance safety, motorcycle manufacturers should consider the materials and attachment methods used for the fuel tank. The use of materials with inherent resistance to cutting and tearing, such as high-density poly-ethylene, can improve the tank's integrity during a crash. Additionally, attaching the tank with flexible components that allow it to displace and deform with the surrounding structure can reduce the likelihood of ruptures. Rigid attachments, such as sheet metal screws passing through the tank flange, should be avoided as they can force the tank to deform and rupture.
In summary, the best placement of the fuel tank on a motorcycle to avoid ruptures in accidents is directly over the engine at the front. This location strikes a balance between accessibility, handling, and safety by minimising the chances of the tank being struck in common types of collisions. Additionally, the use of rupture-resistant materials and flexible attachments further reduces the risk of ruptures, enhancing the overall safety of the motorcycle.
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Frequently asked questions
The fuel tank on a motorcycle is usually located directly over the engine. It can be found underneath the rear seats and/or trunk, or it may be underneath the actual tank or on the sides.
Here is a general guide to removing a motorcycle fuel tank:
- Secure your motorcycle on a stable and secure platform.
- Remove the fuel by running it down or siphoning it out.
- Remove the seat and any fairings, if necessary.
- Disconnect any tank straps and tank bolts.
- Disconnect the fuel pump and clear gas lines.
- Disconnect the main fuse and the fuel line.
- Remove any attachments or consoles.
First, seal the holes in the tank. Most tanks have a filler cap and a petcock outlet, but some may have crossover tubes. You can use silicone plugs, rubber or vinyl vacuum caps, or threaded fittings. Then, remove the fuel pump plate if necessary. Finally, use a gasket with a block-off plate.
