Hello,

I am in the process of putting everything straight on my KVF 400 2000 (4x4) that I bought a few weeks ago.

I have some questions regarding the carburator and all the hoses connected to it. I have several ones that are currently either not connected at all, or plugged with screws. I noticed that the ATV is smelling gas, but I could not find any leakage. I was wondering if I could find a diagram telling me where to connect all those hoses.

I bought the service manual, but I could not find a lot of info regarding this matter.

My concern is mainly regarding two hoses, so if someone has answers, I would be grateful:

The gas cap tube has been removed. I don't know where to connect it if I add a new one.

There is one transparent tube about 3/8 on the left side of the carb going toward the back of the ATV. Mine is only about 8 inches long. Should it be connected somewhere or is it just an overflow?

Since I am asking questions about hoses, I found a small one (about 1/4) connected to the purge of the water pump (under it) and connected to it, an anti reverse flow valve and a 10 inches hose attached to it going up toward the fuel thank, but not connected to anything. I suspect it has no purpose. can someone confirm it?

Thank you all

Martin

 

I have exact same machine, just can't remember on the hoses and it's all buried behind plastic panels and the tank. I do recall what a pain it was to change jets.

The carb is heated by engine coolant.

From looking at the parts diagram, there is a little hose that attaches to the bottom of the float bowl and it appears to have a little filter. I think this is the hose that exits toward the rear and down.

https://www.kawasakiepc.com/SystemSe...TOKEN=62503134

The coolant hose, I think, attaches to a little plastic nipple that rotates a little.

The fuel line, my guess, enters carb with a solid fitting it slips over.

 

Thank you MrSummit,

Yes the hoses are all buried, so they are not easy to see.

I got the main fuel and coolant ones attached correctly. Form the carb, I only have two left unconnected. One is the purge one under the carb. This one is left like this on purpose and is used to adjust the float level if I am not mistaken. The only one left is the big transparent one. I really think it is just an overflow. (part 92059A in the diagram) Ronnie's Mail Order for atv parts, atv tires, snowmobile, watercraft and motorcycle featuring an OEM microfiche parts finder.

Do you know to where the gaz cap hose should be connected? I don't currently have one installed and was wondering if it should be connected to something or it's purpose is just to channel to channel any over pressure gaz away from the driver.

Thanks again

Martin

 

The hose coming off the bottom of the float bowl serves no operational purpose. It is merely there to channel fuel away from engine when and if you choose to drain the float bowl.

The only way to adjust float level is to remove the bowl and bend the spring tang.

The hose coming off the fuel tank cap is just a vent hose and should be routed front and down thru the hole where the throttle cables go.

 

Sorry for the late response. MrSummit is a bit wrong on the hose coming off the float bowl. Yes it does serve as the drain when you open the drain screw, but it also is an overflow if the float bowl fills completely, such as when the float valve gets stuck open. This happens a lot on this machine because little chunks of fuel shutoff valve come off and end up stuck in the float valve. This happened to me 9 miles out one time and I had to drive back using the fuel shutoff to regulate the float level.

So, that hose should be routed away from anything hot enough to ignite if fuel starts spewing out of it while you're riding. The hose coming off mine is short also but then there's a check valve on the end (to keep water from entering the carb through the hose), and another hose is attached to the check valve to direct any fuel that comes through it safely to the rear. It stops under the air outlet hose for the CVT cover, which I guess is a safe place for it to terminate. And yes, it can be used to check the float level (just hold the hose upward and open the drain screw and you'll see the float level in the hose).

As for the gas cap vent hose, I routed mine into the rat's nest in the handlebars and then down the left upper frame rail to the back of the ATV where any vapors will exhaust behind the driver but not near the muffler.

To prevent the stuck float valve problem you should get an inline fuel filter that goes between the fuel shutoff and the carb. This is what I used, if the link works:
Fuel Filter for John Deere Lawn Tractors-GY20709 at The Home Depot

 

Thanks Hiker for explaining the drain hose. I wondered why the check valve was on there and that makes sense.

Also, on the filter - beware that it could create a flow restriction when your fuel level gets low. There may not be enough pressure created by the fuel in the tank to continue to flow thru the filter and all of a sudden you are out of fuel. This can happen when the fuel gets low, probably after you've been on reserve a while.

The fuel filter thingy got me on my street bike (Concours) but I had already read about the probability and thought it wouldn't happen to me because I've had filters on other bikes. That was a 5/16 line with a quality filter.