Question about 1986 Honda VT 500 C Shadow
1986 VT 500 C SHADOW FUEL TANK AND PETCOCK LINES? I have 3 line openings (*******?) on the petcock, and one line opening (nipple) underneath, on the bottom of the tank at the front of the bike. Just need help with locations of. ON PETCOCK 1) The Larger nipple is for the fuel line. 2) Smaller one, on side of petcock, pointing down, and located in the front of bike side o the petcock, the line comes off the cylinder and plugs to the nipple which is the vacuum line. 3)The third Petcock nipple (also small nipple) on the back pointing towards bike frame, is where I need help because there are no lines near it to attach it to so my question is where should I run this small line when I get a new one? What does it attach to if anything? East coast bike and no charcoal canister/emissions. 4) Also, the nipple at the front of the tank underneath had a short line that looked like it was broken off, but believe this is just the tank vent line that can be run down through the frame or someplace close? Thanks in advance for your help...
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1986 VT 500 SHADOW fuel line routing Google Search
Air Cut Off Valve Fuel and Vent Hose Connections for 1985 Honda Shadow...
Posted on Jul 14, 2017
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Posted on Jan 02, 2017
SOURCE: fuel petcock
The petcock is what the fuel flows through when it comes out of the gas tank. It probably includes: * A switch with positions for On, Off and Reserve. * A fuel line going to the carburetors. * A vacuum hose attachment which attaches to a carburetor which tugs on a rubber diaphram to let gas flow through. * An overflow/drip valve from the vacuum area. It's located right under the tank on the rear/left side.
Posted on Nov 10, 2008
Sounds like you have a hole in the vacuum diaphragm that opens and closes the petcock. This is one of the problems with the vacuum operated device. The other problem is that sometimes they don't open and you're left stranded with a full tank of gas and not a drop in the carburetor. I changed to a manual operated petcock. Personally, I'd rather have a Pingle petcock than another vacuum operated Harley petcock. If you do change to a manual operated petcock, don't forget to plug the small vacuum hose.
If you want to keep your vacuum operated device, I think you can buy a replacement diaphragm. You will have to drain the tank and remove the petcock. There are four small screws on the backside. Remove the screws and the backplate will come off. The diaphragm and a sping is all that is in that section of the petcock.
Posted on Apr 01, 2010
if you dont use the original style you will flood the carbs every time. the vac style on this bike has metered flow for these carbs
Posted on Sep 06, 2010
Testimonial: "Thanks.Was very helpful."
is there one bigger then the other on the nipples. If so the one bigger is for the carb fuel and the little one should run down the left carb, betewwn the front of the carb and the carb mount.
Posted on Nov 04, 2010
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