Rajan Wilcox
A fuel petcock is a valve that controls the flow of fuel from a motorcycle's tank to the engine. Fuel petcocks should be replaced if they show signs of leakage or malfunction, which is generally rare. This can be done by draining the fuel, removing the screws located on the valve, and replacing the petcock and all the gaskets, bolts and screws. Installing the new petcock is just the reverse of removing it.
| Characteristics | Values |
|---|---|
| When to replace | When the petcock is clogged or leaking |
| Steps | 1. Drain the fuel tank |
| 2. Remove the fuel lines connected to the petcock | |
| 3. Remove the bottom piece, screen and o-ring | |
| 4. Put the new petcock in place and secure the screw | |
| 5. Use pliers to replace the screen and o-ring | |
| 6. Screw on the bottom piece and tighten it with a wrench | |
| 7. Run some fuel through the new valve to test it | |
| 8. Re-install the tank and reconnect the fuel lines | |
| Tools | Wrenches, pliers, a new petcock, thread-sealing tape |
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What You'll Learn
How to drain your fuel tank
To drain your fuel tank, you should first close the petcock. Then, remove the fuel lines connected to it. Place a coffee filter inside a funnel and drain the fuel tank into a fuel can by opening the petcock. If there is little fuel remaining, you can plug the fuel tank cap vent line and turn the tank over.
Once the fuel tank is drained, you can begin to replace the petcock. Remove the bottom piece, screen and o-ring, and then put the new petcock in place and secure the screw. Use pliers to replace the screen and o-ring, and then screw on the bottom piece and tighten it with a wrench.
Run some fuel through the new valve to test it out. Once you're sure there aren't any leaks or clogs, re-install the tank and reconnect the fuel lines to the outputs on the new petcock.
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How to remove the petcock
To remove the petcock, you should first drain the fuel. If there is little fuel remaining, you can plug the fuel tank cap vent line and turn the tank over. Next, remove the screws located on the valve (what you use to switch to the "on" and "off" positions). Then, remove the petcock and replace all the gaskets, bolts and screws.
The alternative is to replace the old petcock with a new one. This is generally a simple process, as the petcock usually slides out and the new one slides in, secured with the supplied bolts.
To install the new petcock, simply reverse the removal process: remove the bottom piece, screen and o-ring, put the petcock in place and secure the screw, then use pliers to replace the screen and o-ring. Screw on the bottom piece and tighten it with a wrench.
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How to replace the petcock
To replace the petcock, you will need to drain the fuel from your tank. If there is little fuel remaining, you can plug the fuel tank cap vent line and turn the tank over. You will then need to remove the screws located on the valve (the ones you use to switch to the "on" and "off" positions), remove the petcock, and replace all the gaskets, bolts and screws.
If you are replacing a petcock on a motorcycle, you will need to remove the fuel lines connected to it, and drain your fuel tank into a fuel can by opening the petcock. You can set up a coffee filter inside your funnel to do this.
To install the new petcock, simply reverse the removal process: remove the bottom piece, screen and o-ring, put the petcock in place and secure the screw, then use pliers to replace the screen and o-ring. Screw on the bottom piece and tighten it with a wrench. Run some fuel through the new valve to test it out. Once you're sure there aren't any leaks or clogs, re-install the tank and reconnect the fuel lines to the outputs on the new petcock.
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How to test the new petcock
To test a new petcock, you will need to disconnect your fuel tank and prop it up. Then, take a handheld red portable fuel tank to catch the fuel coming out of the bike fuel tank, turning the Pingel fuel valve on and off. You can also use an air can to see if the petcock works when it is not installed on the tank.
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How to reconnect the fuel lines
To reconnect the fuel lines, you will need to follow the steps below.
First, drain the fuel tank. You can do this by plugging the fuel tank cap vent line and turning the tank over if there is little fuel remaining. If there is a lot of fuel, drain it into a fuel can by opening the petcock and using a coffee filter inside a funnel. Once the fuel is drained, remove the screws located on the valve (the ones that switch the valve to the "on" and "off" positions). Next, remove the petcock and replace all the gaskets, bolts and screws. You can then slide the new petcock into place and attach it using the supplied bolts. Finally, reconnect the fuel lines to the outputs on the new petcock.
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Frequently asked questions
A fuel petcock is a valve that controls the flow of fuel from a motorcycle's tank to the engine.
Fuel petcocks should be replaced if they show signs of leakage or malfunction.
You will need wrenches, pliers, a new petcock, and potentially thread-sealing tape.
First, drain the fuel. Then, remove the screws located on the valve, remove the petcock and replace all the gaskets, bolts and screws. Installing the new petcock is just the reverse of removing it: remove the bottom piece, screen and o-ring, put the petcock in place and secure the screw, then use pliers to replace the screen and o-ring. Screw on the bottom piece and tighten it with a wrench.
