Full Answer
What is a petcock valve?
A petcock is a valve used to control air and fluid flow through a vehicle's engine and coolant systems. The type of valve and the valve design differ per application. Some types of valves install within a fuel system to control the flow of gas between a fuel tank and a carburetor.
Where is the petcock on a motorcycle?
Don't Throw It Away! Gasoline essential to the proper operation of your motorcycle is controlled by a “Fuel Control Valve” otherwise known as a “Petcock”. This valve is characteristically located at the bottom of the fuel tank and can have a number of different configurations. Fuel-Injected motorcycles rarely have a petcock.
What happens when a petcock is full of fuel?
When the petcock sits in the "closed" position, fuel will not flow to the engine's carburetor, and when the petcock is turned to "full," the fuel line will sit fully open. One last position on most fuel petcocks changes the flow of fuel from a main fuel tank to an auxiliary fuel tank. Coolant system valves have one threaded and one smooth end.
What does the petcock do?
A petcock is a small shut-off valve used to control the flow of liquid or gas. Historically, petcocks were threaded valves controlled by a butterfly handle; modern petcocks are typically ball valves.
Should you turn the petcock off?
The primary reason for shutting off the fuel is safety. On a motorcycle the fuel tank is directly above the engine. If fuel were to leak it would drip directly on the hot engine.
How does a petcock valve work?
2:087:21How does a motorcycle petcock work? - YouTubeYouTubeStart of suggested clipEnd of suggested clipWhen the petcock is on on or rez. If. If the the engine shuts off then theoretically the the petcockMoreWhen the petcock is on on or rez. If. If the the engine shuts off then theoretically the the petcock should shut off even though you know the petcock might still be on on or on reserve.
What is a petcock on a carburetor?
A petcock, or sometimes referred to as a fuel tap or fuel valve, is a 2 or 3 way valve on the bottom of your fuel tank. It works by directing fuel from your tank to the carburetors or fuel injectors. Fuel is pulled by either gravity or vacuum from the fuel system.
What position should my petcock be in?
0:292:54How to use a Fuel Petcock // Fuel Valve // Motorcycle // Yamaha TW200YouTubeStart of suggested clipEnd of suggested clipSo on my 2021 tw200 the fuel petcock is located right beneath the tank on the left hand side of theMoreSo on my 2021 tw200 the fuel petcock is located right beneath the tank on the left hand side of the vehicle.
Do I need a petcock?
A carburetor needs a petcock because it needs a way to control the flow of fuel to the engine. Without a petcock, the carburetor would just dump all the fuel into the engine at once. This would cause the engine to run too rich and it would flood.
Why do they call it a petcock?
petcock (n.) also pet-cock, "a small plug-cock, made to be fastened to a pipe and used for draining water and condensation from steam cylinders, etc.," 1864, from cock (n. 2); the signification of the first element is uncertain.
Where is the petcock valve located?
Petcock valves may be installed inside a carburetor. Fuel petcocks install in an accessible location of a gravity-fed fuel system.
Should the fuel valve be on or off?
Not only does shutting off the fuel valve prevent the engine from flooding while being transported, it prevents flooding because of contamination in the float valve, and extends the life of the float valve by decreasing pressure on it.
How do I clean a petcock?
Using something pointy, gentle pry the four holed rubber grommet out of the petcock. Wash the petcock out with clean gasoline. Flush the gas tank out with clean gasoline. If it's all rusty inside, acid etch it and seal it with Kreem or POR-15.
How do I fix my fuel petcock?
1:195:56how to rebuild a leaking fuel tap motorcycle petcock - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd carefully remove the diaphragm block from the fuel tap. One of two things goes wrong with theseMoreAnd carefully remove the diaphragm block from the fuel tap. One of two things goes wrong with these one is if you're not getting any gas this rubber diaphragm.
Do fuel injected bikes have petcock?
Gasoline essential to the proper operation of your motorcycle is controlled by a “Fuel Control Valve” otherwise known as a “Petcock”. This valve is characteristically located at the bottom of the fuel tank and can have a number of different configurations. Fuel-Injected motorcycles rarely have a petcock.
Should the fuel valve be on or off?
Not only does shutting off the fuel valve prevent the engine from flooding while being transported, it prevents flooding because of contamination in the float valve, and extends the life of the float valve by decreasing pressure on it.
What happens if you leave fuel on motorcycle?
When a motorcycle runs out of gas, the motorcycle will begin to sputter for several seconds and lose power. Some motorcycles may even simply quit without warning. You will be able to coast for several feet so it's important you find a safe place to coast to and park your motorcycle.
What would happen if the choke is left on?
Leaving the choke on for too long will cause unnecessary engine wear and waste fuel. This is also bad for the environment. The choke is mainly used during winter to help with starting. The engine needs its fuel to be vaporised in order to burn it.
How do you turn the fuel off on a motorcycle?
0:145:08How to use the Motorcycle "Petcock" Fuel Shut Off Valve - YouTubeYouTubeStart of suggested clipEnd of suggested clipWe have three settings to choose from off on or res the reserve tank you simply just switch to theseMoreWe have three settings to choose from off on or res the reserve tank you simply just switch to these you'll notice an arrow. This little piece right here. You can select off on or res.
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