You're out on a road trip with friends when you suddenly notice that you're running out of gas.fast! You panic a little, but then you start to calm down when you spot the petcock valve. You slowly turn its lever from the .on. to the .reserve. position. And just like that, you're safe! You have enough gas to last you until you make your next stop. You then think to yourself, what would life be without this valve? Sometimes, it's inevitable to miscalculate the gas in your tank, so the petcock valve is definitely a genius addition to your bike that can prove to be a lifesaver. If your petcock is currently broken, you'd better fix it right away. Here's a quick guide that will help you understand this component better.
How does a petcock valve work?
The main purpose of a petcock is to select which tube the fuel pump will use to get fuel from the tank. The fuel pump can use two tubes.one is located at the bottom of the tank while the second one is about an inch higher. When the valve is at the .on. position, the fuel pump gets gas from the higher tube. On the other hand, the pump gets gas from the bottom tube if the valve is turned to the .reserve. position.
What's the difference between old and modern petcock valves?
Compared to older models, you'll notice that newer petcocks lack the .off. position. Instead of this, they have the .pri. or prime position. This setting activates a vacuum valve that shuts off when the engine stops. It overrides the vacuum system and allows the carburetor to be refilled.
How do I clean my motorcycle petcock valve?
This is a quick and general guide that is applicable for newer bikes that have modern petcocks.
Step 1: To begin, locate the bottom of the petcock and remove the fuel line from the fuel outlet. After that, insert plastic tubing on the outlet and have one end of the tube in a gas can. Set the lever to .pri. position and drain the fuel into the gas can. Take the tube out once you finish draining.
Step 2: Next, lift rider's seat off of the bike using your keys and then use a socket and wrench to unscrew the bolt at the base of the gas tank. After that, remove the gas tank completely by removing the vacuum hose.
Step 3: Remove the petcock from the tank by taking its mounting screws out. After that, remove the screws at the front and rear part of the valve, taking out its face and back plates in the process. You should also remove its gaskets, lever, and spring.
Step 4: Start cleaning the petcock valve by spraying its inlet and outlet tubes with carburetor cleaning spray. If this is not enough, you can also soak the petcock in a solution made of lemon juice and water for about an hour. After that, air-dry the valve before reattaching it to your bike.