Ameer Randolph
Draining a motorcycle fuel tank is a necessary skill for any rider, whether you're performing maintenance, dealing with clogged filters, or preparing your bike for storage. While it may seem daunting at first, it's a straightforward process that can be accomplished through several methods. One common approach is to use a hose to siphon the fuel out of the tank, either by creating a vacuum with your mouth or pressurizing the tank by blowing air into it. Alternatively, you can simply remove the fuel line or tilt and lift the tank to drain the fuel. Regardless of the method chosen, safety should always be a top priority when handling flammable liquids like gasoline.
Characteristics and Values Table for Draining a Motorcycle Fuel Tank
| Characteristics | Values |
|---|---|
| Tools | Hose, lung power, gas can, rag/washcloth, funnel, bulb pump |
| Steps | Close the petcock, lift the tank off, blow into the hose, check the petcock, scrub the screen filter, refill with new gas |
| Tips | Use a funnel to avoid spills, use a bulb pump to start the siphon, add seafoam to stabilize leftover fuel |
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What You'll Learn
Using a hose to siphon the fuel out
To drain a motorcycle fuel tank using a hose, you can try the following:
Firstly, obtain a hose that is long enough to reach from the tank to a gas can or container. If you don't have a hose, you can purchase one. A suggestion from a motorcycle forum is to get six feet of clear 3/8" ID vinyl hose, cut one foot off, and use the remaining 5 feet to reach into the tank and the gas can.
Now, insert one end of the hose into the fuel tank as deep as you can, and place the other end into the gas can. Take the one-foot length of hose you initially cut off and place one end just into the tank's opening. You can use a rag or washcloth to create a seal around the filler hole and the two hoses.
The next step is to blow into the short hose. A lungful of air should be enough to pressurize the tank and start a siphon. This method is safer than sucking on the hose to start the siphon, and it works for cars and trucks too (although it may require a little more blowing).
Alternatively, you can attach a hose to the petcock and place the other end in a gas can. Then, simply open the petcock to drain the fuel. However, this method may not be feasible for some motorcycles without a petcock.
Remember, it is important to exercise caution when handling gasoline and always ensure proper ventilation.
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Blowing into a hose to pressurise the tank
Blowing into a hose is one way to drain a motorcycle fuel tank without making a mess. This method is also known as the "pressure technique". It involves using tubing and an air compressor. Here is a step-by-step guide:
- Obtain a suitable length of tubing that will reach the bottom of the fuel tank.
- Insert one end of the tube into the tank, ensuring it reaches the bottom.
- Blow air across the free end of the tube to start the suction. You may need to cut the end of the tube at an angle and blow air across the opening, directing the airflow away from the hose and towards the desired direction of flow.
- Allow gravity to assist in draining the fuel.
- Hold the free end of the tube over an empty container, such as a jerry can, to collect the drained fuel.
It is important to exercise caution when using this method, as blowing compressed air into the tank can potentially cause a leak. Additionally, ensure that you do not inhale any fuel vapours during the process.
Another approach to draining the fuel tank is to use a siphon. This method involves siphoning the fuel out of the tank into a container. It is important to use a small-diameter tube for the siphon to reach the bottom of the tank effectively.
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Removing the fuel line
To start, you will need to gather the right tools. One method involves using a hose, so ensure you have a hose long enough to reach from your motorcycle's fuel tank to a gas can placed on the ground. You may also require a rag or washcloth, and some gloves and eye protection for safety.
Once you have your equipment, identify the fuel line and petcock. The petcock is usually located near the bottom of the fuel tank. Place your gas can on the ground, ensuring it is secure and will not tip over. If your motorcycle has a petcock, close it before removing the fuel line. This will help reduce the risk of spilling fuel.
Now, carefully remove the fuel line by loosening any clips or fasteners holding it in place. Be gentle to avoid damaging the fuel line or any surrounding components. You may need to tilt or remove the main tank to access the fuel line, depending on your motorcycle's configuration. If you are unsure, refer to your motorcycle's manual or seek advice from a mechanic.
With the fuel line removed, place one end of the hose into the opening from which the fuel line was removed and ensure a snug fit. Place the other end of the hose into the gas can. If using a rag or washcloth, place it into the filler hole to create a seal around the hose. You can now blow into the hose to start the siphoning process and drain the fuel tank. Alternatively, you can carefully tilt the motorcycle to encourage the fuel to flow through the hose into the gas can. Remember to handle the fuel carefully and avoid any open flames or sparks during this process.
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Closing the petcock and lifting the tank off
To begin, locate the petcock on your motorcycle. The petcock is usually found near the bottom of the fuel tank and is responsible for controlling the flow of fuel. Once you have located the petcock, close it by turning it clockwise. This will stop the flow of fuel and allow you to safely lift the tank off without spilling any fuel.
Before lifting the tank off, ensure that the seat is out of the way. Lift the tail and slide it back to clear the rubbers, then carefully lift the tank off. It is recommended to have an extra pair of hands to help with this process, as a full fuel tank can be quite heavy and clumsy to handle alone.
By closing the petcock and lifting the tank off, you will have direct access to the fuel tank and can easily drain the fuel into a suitable container. Remember to handle the fuel with care and take the necessary precautions to avoid any spills or accidents.
This method provides a straightforward way to drain the fuel tank of your motorcycle, allowing you to perform maintenance or resolve any fuel-related issues. Always exercise caution when working with fuel and ensure proper ventilation during the process.
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Cleaning the petcock and fuel filter
To clean the petcock and fuel filter of your motorcycle, begin by draining the fuel tank. This can be done by removing the fuel line, physically dumping out the fuel, or siphoning it out. Once the tank is drained, you can inspect the petcock for any signs of clogging or blockage.
If the petcock appears clogged, you can try blowing through it to clear any debris. You should also inspect the screen filter for any dirt or buildup and clean it with a toothbrush if necessary. In some cases, you may need to remove the petcock entirely to clean it more thoroughly. If your motorcycle has an inline fuel filter, it is important to clean or replace it as well, as a clogged fuel filter can cause issues with the engine's performance.
After cleaning the petcock and fuel filter, reassemble the components and refill the fuel tank with fresh fuel. It is recommended to add a fuel additive, such as seafoam, to the new fuel and run the engine for a while to ensure proper functioning.
If you are experiencing issues with rust in your fuel tank, more extensive cleaning may be required. This includes derusting the tank, cleaning or replacing the petcock, changing all fuel hoses, and cleaning the carburetors. It is important to note that some fuel filters from auto parts stores may not be suitable for motorcycles, so ensure you are using a motorcycle-specific fuel filter if replacement is necessary.
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Frequently asked questions
There are a few ways to drain a fuel tank on a motorcycle. One way is to close the petcock and lift the full tank off. Another way is to put a hose on the petcock and the other end into a gas can, then open the petcock to drain the fuel.
If your motorcycle has been stored for a long period of time, such as over the winter season, it is recommended to drain and stabilize the fuel before refilling the tank. Additionally, if your motorcycle is running lean or having trouble starting, it could be due to clogged filters or bad gas, which can be resolved by draining and cleaning the tank.
To siphon fuel, you can use a vinyl hose and a gas can. Insert one end of the hose into the tank and the other end into the gas can. Create a seal by placing a rag or washcloth around the filler hole and hoses. Then, blow into the hose to create pressure and start the siphon.
After draining the fuel tank, it is important to clean the petcock and screen filter. You can also add fresh fuel and some seafoam to the tank and run the engine for a while before riding. Additionally, consider performing a full maintenance check to ensure your motorcycle is in good condition.
