Fuel leak continuing, any new ideas? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 31 Old 10-18-2009, 11:05 AM Thread Starter
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Fuel leak continuing, any new ideas?

I am still having an intermittent fuel leak. I've not had the bike out for about two weeks. Started it yesterday and it leaked fuel again from up under the tank. I took a flashlight light and it is coming from near the throttle bodies. Shut the bike off and let it sit while I did something else. When I started it back up, it didn't leak. I went to the dealer and talked to a guy in the service department. He said to lift up the tank and start it. Look around the fuel pump at the fuel line. Maybe a leak there but he would have to look at it. He said to trailer it in and didn't recommend riding it.

When I started it this morning, no leak. I have removed the tank. It was definitely not coming from the fuel pump area. It seemed to be coming from where the fuel line goes into the throttle body. Unfortunetly, gas doesn't leave much residue so I can't tell where it is coming from.

It seems to only leak after it has sat for a week or more. Does anyone have any bright ideas? It's a beautiful day in Nashville after weeks of rain. I might slit my wrists if I can't ride. Please help. Thanks.
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post #2 of 31 Old 10-18-2009, 11:13 AM
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The usual culprit is the hose between the throttle bodies shown in blue below. Sometimes it may be the O-ring connecting the fuel rail to the throttle body. The near one is in green and the far one is un-colored.


Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
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post #3 of 31 Old 10-18-2009, 11:13 AM
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Get rid of all of those lousy factory crimp on fuel line clamps and replace them with some automotive fuel injection fuel line clamps. I started my Vee one night and everything was fine, nest time I started it fuel was showering everywhere. New clamps, one the piece of fule line between the throttle bodies, problem fixed.

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post #4 of 31 Old 10-18-2009, 12:32 PM Thread Starter
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Hey Greywolf, I have the tank and air box removed. Is the o-ring in the hose that connects the fuel pump with the throttle body? Or, is the o-ring in the aluminum tube colored in green?

While I am here, I am going to replace the hose that goes between them. I can't tell if it has a hole or not. There are two clamps that I am not familiar with on each end.

Thanks, Bill
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post #5 of 31 Old 10-18-2009, 01:01 PM
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It's usually the clamps that cause the problem. They are crimp type and this type works better.

Don't use the following as they don't work with fuel injector pressures.

An O-ring is at the connection of each fuel rail to each throttle body for a total of two, not at the hose. O-rings connect solid parts, not flexible ones.

Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
See https://www.stromtrooper.com/general-...nicknames.html

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post #6 of 31 Old 10-18-2009, 02:12 PM Thread Starter
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Thanks! I just got back from Autozone.
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post #7 of 31 Old 10-18-2009, 10:39 PM Thread Starter
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Problem looks like it is fixed. I replaced the hose and the o-ring.

If you ever have to replace the hose, it can be tricky to get it on. You only have about a 1/4" room between the two tubes. After messing with it for more than an hour, my brother came over and did it in 1 minute. Here's how. Take the hose and bend it in half with a pair of pliers. Put each open end on each tube at the same time. Give it a little wiggle and there you go. One 2" new tube is on.

The real test will be over the next few weeks. Since this problem only happened every now and then, I won't know if it fixed the problem. We'll see.
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post #8 of 31 Old 10-18-2009, 10:58 PM
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This has happened to me twice now in the 2 1/2 years I have owned this bike. Each time it was only after not being ran for two weeks or so. Actually last time it was a month. The only time my bike sees this kind of downtime is during my annual vacation. Usually it's never down for more than 2 or 3 days at a time. Both times I turned it off restarted it and it went away like majic! Mine seems to be leaking at the Tee item # 11 in the above pic. Since it is only a once a year thing I have never pursued it any further.

Kevin

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post #9 of 31 Old 10-19-2009, 06:07 PM Thread Starter
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Makes me wonder if there is a type of o-ring that needs gas sitting on it to stay lubricated. When it dries out, it leaks a little. Once it is started (and leaking) and then shut off, it seals itself.

Anyway, I replaced the little hose between the two. I also replaced the hose and two fittings that go from the tank to the green pipe colored above. I thought it could be the little gaskets in that tube. I will watch it.
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post #10 of 31 Old 08-01-2011, 01:22 AM
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Quote:
Originally Posted by greywolf View Post
It's usually the clamps that cause the problem. They are crimp type and this type works better.

Don't use the following as they don't work with fuel injector pressures.

An O-ring is at the connection of each fuel rail to each throttle body for a total of two, not at the hose. O-rings connect solid parts, not flexible ones.
Hey Greywolf,

Wonder if you can tell me the size of this type of clamp that you recommend (or the size of the fuel pipe they go on to) per chance? How many should I buy to do a complete job?

Also how do I remove the lower part of the air box? I can see the 2 x clamps on the throttle bodies although the front looks more difficult to get to than the rear. Are they all I need to undo?

I'll then hopefully have the clamps in hand when I remove the lower part of the air box.

Thanks in advance!

Nordkapper
Cheers,
Nordkapper
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