How do you hook up a fuel petcock?
- Step 1: Drain Fuel Tank. With the petcock closed, remove the fuel lines connected to it.
- Step 2: Remove Old Petcock. Use a box wrench to unscrew the “gunk collector” at the bottom of the petcock, then a pair of pliers to remove the inner screen and o-ring.
- Step 3: Install New Petcock.
- Step 4: Replace Tank on Bike.
How to fix leaky petcock?
Remove the screws located on the valve (what you use to switch to the “on,” and “off” positions), remove the petcock and replace all the gaskets, bolts and screws. This is the simplest repair to most leaky fuel petcocks.
Should I turn off petcock?
No, there is no legal requirement that you should turn the petcock to “OFF” when you shut your bike down at the end of your ride. However, it is a good practice, especially if you own an older motorcycle (1990s vintage or earlier), before gravity-fed carburetors were largely replaced with fuel injection systems.
How to install a manual fuel petcock [ video ]?
I used a piece of 1/2″ fuel hose and 2 hose clamps to attach the tank’s outlet to a 3/8″ NPT male to female 90 degree elbow. Then I used a 3/8″ NPT to 1.4″ hose barb. I used 1/4″ Tygon hose, a manual petcock, the same Spectre fuel filter I was using, and some hose clamps to complete the fuel line.
What kind of petcock is on a motorcycle gas tank?
The 22mm motorcycle petcock bung is also found on a variety of custom gas tanks such as the Narrow Frisco Sporty Gas Tank and the Blackbird Legacy Gas Tank for 1983-2003 Harley-Davidson Sportsters®.
Do you need a vacuum cap for a fuel petcock?
If you do this, you’ll also need to put a vacuum cap on the vacuum port of the carburetor. This is very ugly. I hate the way it looks, but at least it’s not a vacuum petcock anymore. Maybe I’ll do something better later, dunno. It’s a pleasant change to simply open the manual fuel petcock and watch fuel instantly fill the line and filter.
How do you replace a vacuum petcock on a scooter?
There are thread on replacements for some scooters that will install just like your original vacuum unit. Some folks are using 3/8″ NPT fittings to thread onto their gas tanks and remove the vacuum petcock, yet I couldn’t find anything to work in the local hardware store that was the same thread as mine.