Sorry I forgot to mention my bike is a 2001 VN 800 classic. Also the other end of that hose seems to connect to the carburetor. Sorry for the omissions
Vn800 fuel system problem/flooding
Hey everyone,
After fixing my exhaust leak last year my bike ran great for the season and when it was time to put it away I put some fuel stabilizer and stored in my garage. Today I took it out for my first ride and it was running fine initially. I filled up a full tank of gas and almost immediately the bike started almost stalling at every light. About 5 km later installed out and gas was pissing out of the overflow, the bike was flooded and would not start. After letting it sit for a bit I was able to get it to start and got home by continuously revving the engine. I had thought that maybe the float needle had gotten gummed up so I figured I would run a can of seafoam through it and if that doesn't work take it apart and clean it. I put the seafoam in it and started it and again gas came over the overflow but it also started pissing out from the back of the bike. After taking the seat off I noticed the gas was coming out of the hose in this picture. After looking at the fuel system diagram I believe this hose is supposed to hook to a canister but I'm not sure. It doesn't look like there's anywhere for it to hook up. Is this just a vent hose and it's pissing out gas because it's flooding so bad? My next step is to take it apart and clean all the lines as well as the carb. I also recently painted the bike and was thinking that maybe I got some paint in the tank and when I added the gas it dissolved and bunged up the system somewhere, but I'm also not sure if this hose got disconnected and maybe that's the issue. If someone could give me some guidance on where this hose goes so I could rule it out that would be fantastic. Thanks for the help!
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After fixing my exhaust leak last year my bike ran great for the season and when it was time to put it away I put some fuel stabilizer and stored in my garage. Today I took it out for my first ride and it was running fine initially. I filled up a full tank of gas and almost immediately the bike started almost stalling at every light. About 5 km later installed out and gas was pissing out of the overflow, the bike was flooded and would not start. After letting it sit for a bit I was able to get it to start and got home by continuously revving the engine. I had thought that maybe the float needle had gotten gummed up so I figured I would run a can of seafoam through it and if that doesn't work take it apart and clean it. I put the seafoam in it and started it and again gas came over the overflow but it also started pissing out from the back of the bike. After taking the seat off I noticed the gas was coming out of the hose in this picture. After looking at the fuel system diagram I believe this hose is supposed to hook to a canister but I'm not sure. It doesn't look like there's anywhere for it to hook up. Is this just a vent hose and it's pissing out gas because it's flooding so bad? My next step is to take it apart and clean all the lines as well as the carb. I also recently painted the bike and was thinking that maybe I got some paint in the tank and when I added the gas it dissolved and bunged up the system somewhere, but I'm also not sure if this hose got disconnected and maybe that's the issue. If someone could give me some guidance on where this hose goes so I could rule it out that would be fantastic. Thanks for the help!
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It located under the seat, heres a pic
Hard to tell, the carb bowl vent and tank vent as well as battery vent hose should be hanging under the bike. figure out if they are all there and then trace back, check the other ends. Could be part of the emissions stuff too, 01 has more than my 96 did. And the petcock looks to have the vacuum operated shutoff diaphragm instead of an off position. Shows prime, on and reserve? check the vacuum hose going to the petcock for fuel leaking through the diaphragm.
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2001 Kawasaki VULCAN 800 (VN800-A7) Fuel Evaporative System | Ron Ayers
Shop online for OEM Fuel Evaporative System parts that fit your 2001 Kawasaki VULCAN 800 (VN800-A7), search all our OEM Parts or call at 252-758-3084
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2001 Kawasaki VULCAN 800 (VN800-A7) Fuel Tank | Ron Ayers
Shop online for OEM Fuel Tank parts that fit your 2001 Kawasaki VULCAN 800 (VN800-A7), search all our OEM Parts or call at 252-758-3084
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So I took apart the entire carb, the diaphragm seemed fine, there were no holes or anything and the needle didn't have any guck, I cleaned it all with carb cleaner and blew out all the hoses. Then I figured since I had it all apart, I should check the spark plugs and stick a rag in the hole to absorb any fuel. When I pulled out the front one, it was very black, looks fouled and there was an O ring stuck on the threads (see pic below). I checked the other side and it doesn't look like there is one of these rings in the spark plug hole. I put it all back together and installed an in-line fuel filter between the petcock and the carb. The bike started fairly easily but then flooded again.i have ordered a cylinder compression tester an air filter and I'm going to replace the spark plugs and see if that helps. Could that o ring be causing the issue?It located under the seat, heres a pic
Attachments
The O-ring on the spark plug won't cause flooding, I have no idea what that o-ring is there for, doesn't belong there. I think that is a valve cover bolt o-ring. see #92055 here:
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got to look at the carb and the fuel petcock on the tank, should be a large hose for the fuel and a smaller vacuum hose. Try running it in Prime position with the small hose off and plugged to prevent a vacuum leak. If fuel comes out the small hose nipple on the petcock, you need a new petcock or see about fixing that one. If the actuating diaphragm in the petcock is bad, fluid can run down that hose into the intake. Also verify which fittings are which on the carb. make sure the bowl vent and the fuel hoses are not crossed up. (It has happened,,,)
2002 Kawasaki VULCAN 800 CLASSIC (VN800-B7) Cylinder Head Cover | Ron Ayers
Shop online for OEM Cylinder Head Cover parts that fit your 2002 Kawasaki VULCAN 800 CLASSIC (VN800-B7), search all our OEM Parts or call at 252-758-3084
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got to look at the carb and the fuel petcock on the tank, should be a large hose for the fuel and a smaller vacuum hose. Try running it in Prime position with the small hose off and plugged to prevent a vacuum leak. If fuel comes out the small hose nipple on the petcock, you need a new petcock or see about fixing that one. If the actuating diaphragm in the petcock is bad, fluid can run down that hose into the intake. Also verify which fittings are which on the carb. make sure the bowl vent and the fuel hoses are not crossed up. (It has happened,,,)
For clarification, the hose fitting pointing up and with a B ref. is the vent, the hose fitting pointing horizontal in towards the intake is the fuel inlet.
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2002 Kawasaki VULCAN 800 CLASSIC (VN800-B7) Carburetor | Ron Ayers
Shop online for OEM Carburetor parts that fit your 2002 Kawasaki VULCAN 800 CLASSIC (VN800-B7), search all our OEM Parts or call at 252-758-3084
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This was great feedback, the bike ran in the prime position with the little hose plugged so if I understand correctly the fact the bike runs means it is getting a continuous fuel supply and thus the petcock is bad? Let me know if that is correct. Also, it will take about a week for me to receive a replacement petcock if this is the case BUT I would like to ride now since we have nice weather finally. Is it a bad idea to drive the bike in prime with the vacuum host plugged?
The O-ring on the spark plug won't cause flooding, I have no idea what that o-ring is there for, doesn't belong there. I think that is a valve cover bolt o-ring. see #92055 here:
2002 Kawasaki VULCAN 800 CLASSIC (VN800-B7) Cylinder Head Cover | Ron Ayers
Shop online for OEM Cylinder Head Cover parts that fit your 2002 Kawasaki VULCAN 800 CLASSIC (VN800-B7), search all our OEM Parts or call at 252-758-3084
got to look at the carb and the fuel petcock on the tank, should be a large hose for the fuel and a smaller vacuum hose. Try running it in Prime position with the small hose off and plugged to prevent a vacuum leak. If fuel comes out the small hose nipple on the petcock, you need a new petcock or see about fixing that one. If the actuating diaphragm in the petcock is bad, fluid can run down that hose into the intake. Also verify which fittings are which on the carb. make sure the bowl vent and the fuel hoses are not crossed up. (It has happened,,,)
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