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Here's the answer from Timberwoof's Motorcycle FAQ: "It's a Main/Reserve fuel valve. Its purpose is to select which of two tubes the fuel pump uses to get fuel from the fuel tank. One of the tubes is at the bottom of the tank; the other is about an inch higher. The normal 'On' position gets fuel from the tube with the higher opening. When it runs dry, you switch to 'Reserve' which gets that last gallon or so from the bottom of the tank. That gives you enough range to make it to the next gas station for a fill-up." == Modern petcocks have no Off position. They have a vacuum valve that shuts off the gas when (for any reason) the engine stops. There are three positions of the petcock lever: Pri(me) which overrides the vacuum system to allow dry carburretors to be refilled; never leave the petcock in the Pri position after the carbs are full, carbs can flood, moreover the engine might not shut off if you drop the bike. The On and Res(erve) are held open by the vacuum from the intake manifold. They function as in the first answer. TIP. Fill the tank and set the milometer trip to zero. Check the range of a full tank less reserve. When the milometer trip reads 90% of the range (mine is 100 miles), refill the tank. You will never use reserve, or spend days getting crud out of the carbs again. Tip for newer bikes: If you happen to be fortunate enough to have a newer bike it has been suggested to me to run your bike in reserve every few hundred miles to keep gunk from building up in your tank. This way you don't have to worry if you'll damage your bike if you have to use the reserve.
What else can I help you with?
How do you remove petcock Yamaha kodiak?
To remove the petcock on a Yamaha Kodiak, first, ensure the fuel tank is empty and disconnect the battery for safety. Next, locate the petcock, typically found on the bottom of the fuel tank, and use a wrench to loosen and remove the mounting screws or bolts. Carefully detach the fuel lines from the petcock, ensuring no fuel spills, and then you can remove the petcock from the tank. Finally, clean the area and inspect for any debris or damage before installing a new petcock if needed.
How do you fix an antifreeze leak through your petcock?
Remove and clean the petcock. Replace and if it still leaks, replace with a new petcock.
What is a petcock and do you have a photo?
Answer:You want to see a picture of my petcock? I will show you mine if you show me yours. But my petcock is still a bit wild and not fully trained.........A petcock is a drain valve at the bottom of a radiator.
Where is the petcock on a 03 Impala?
where is the petcock located on a 03 Chevy impala
Where is the petcock of Nissan xterra 2004?
where is the location of petcock Nissan xterra 2004
Where is the radiator petcock on 2003 Nissan Xterra?
The 2003 Nissan radiator petcock is located on the bottom of the radiator. The radiator petcock will be in the center of the radiator bottom.
Where is petcock on 1997 cavalier and how to open it?
1997 cavaliers don't have petcocks, actually no cavalier has a petcock. you can check the bottom of your buddy's motorcycle to find a petcock most likey.
What direction to turn radiator petcock on mopar v-8 radiators?
if your looking down on the petcock from the top of the radiator turn the petcock to the right to loosen it and to the left to tighten.
Where is radiator petcock on 1989 Chevy Celebrity?
The petcock is at the bottom of the radiator on the drivers side of the car.
What to do to get gas petcock unclogged?
Disconnect the fuel lines and use berrymans spray to clean the pit cock.
Why wont the radiator petcock in a 1999 Yukon go back in?
I just ran into this problem. The petcock is plastic and has a metal pin protruding thru the side. This pin rides in a "track" and locks the petcock into place when you put it back in. I broke the pin removing the petcock and had to remove the radiator to repair it. You may be able to do this with the radiator in place. See if you can feel the track and if you replace the pin, you will feel it lock into place when you reinstall the petcock. The pin can only protrude on one side of the petcock so that the petcock will seat correctly. Good luck.
How do you take the petcock off 2006 Honda rancher?
To remove the petcock from a 2006 Honda Rancher, first ensure the fuel tank is empty or has minimal fuel in it to prevent spills. Use a wrench to carefully unscrew the petcock from the fuel tank, turning it counterclockwise. If there are any fuel lines connected, disconnect them gently before fully removing the petcock. Be cautious of any residual fuel and clean up any spills promptly.
