Tube at the end of tank. - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 13 (permalink) Old 08-21-2013, 07:06 PM Thread Starter
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Tube at the end of tank.

Wondering what the tube is towards the seat end of the tank. It's above the place for the bolt. Wondering if I buy another tank without that tube will it mess anything up?
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post #2 of 13 (permalink) Old 08-21-2013, 08:08 PM
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Wondering what the tube is towards the seat end of the tank. It's above the place for the bolt. Wondering if I buy another tank without that tube will it mess anything up?
I think you are talking about the tank vent tube...??? Depends, the tank must have a vent, or a vented cap... Others will chime in that are more help than I...
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post #3 of 13 (permalink) Old 08-21-2013, 08:20 PM
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Quote:
Originally Posted by Nitrospaz9 View Post
Wondering what the tube is towards the seat end of the tank. It's above the place for the bolt. Wondering if I buy another tank without that tube will it mess anything up?
If its a Vulcan 700/750 tank, they all had the tube except I think the first two model years.????

If its not a Vulcan 700/750 tank, I want to see photos of how you got it to fit.
There's no known replacement tank I know of.

But yeah, all tanks have some kind of vent in the cap, so if it don't have a tube you likely don't need one.....

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post #4 of 13 (permalink) Old 08-21-2013, 08:51 PM
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I thought the rear tube was for Cali emissions models, and the main vent was both thru the cap and coming from that nipple (just fer you Knife) thats part of the sending unit assy....



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post #5 of 13 (permalink) Old 08-21-2013, 11:46 PM
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my cali tank had 2 tubes on it but my new tank only has the one on the clutch side

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post #6 of 13 (permalink) Old 08-22-2013, 12:35 AM Thread Starter
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Hmmmmm. What the hell do i do now? Lol. The new tank I bid on doesn't have that tube. Guys not sure what year it's off of but it all seems to match up except for that tube.
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post #7 of 13 (permalink) Old 08-22-2013, 12:54 AM
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If it is a real Vulcan 750 tank, and does not have that tube, you would have to have the vented gas cap that goes with it. If it has one tube, then it is a 49 state model, and that tube is the vent. It is not just a simple vent though. The vent is still in the cap, and you will notice a little projection on the cap near the back that fits into a rubber grommet when the cap is closed. That is the passageway to the vent tube sticking out of the rear of the tank. If it is a CA model it will have 2 tubes, one is the vent, the other is for the evap emissions system, which should be removed. I have a CA model, and al the emissions crap has been removed. I installed short hoses on both the fittings at the rear of the tank, and left the ends open. I'm actually glad I have a CA tank, because I have an extra vent now, in case that little rubber grommet under the gas cap swells up due to ethanol gas and no air can get through it. That second tube terminates directly inside the tank near the filler, and there are no rubber parts to it.

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post #8 of 13 (permalink) Old 08-22-2013, 12:55 AM
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Quote:
Originally Posted by Nitrospaz9 View Post
Hmmmmm. What the hell do i do now? Lol. The new tank I bid on doesn't have that tube. Guys not sure what year it's off of but it all seems to match up except for that tube.
Don't worry about the vent tube.
85 and 86 models just vented through the fuel cap with no vent tube/hose.
Read these two sticky threads on POGS and cleaning the vent system.
https://www.vn750.com/forum/showthread.php?t=22466

Clean your vents on the cap and you will be ok.

The second tank tube on CA models (that's CAlifornia not Canada) was part of emissions controls.
Strip all the emissions crap off the bike and marble or coaster (see Vulcan Verses) the fresh air reed valves on the side of the cylinder heads.

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post #9 of 13 (permalink) Old 08-22-2013, 07:02 AM
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Quote:
Originally Posted by Tofer76 View Post
my cali tank had 2 tubes on it but my new tank only has the one on the clutch side
Yep, my 06 Cali. tank had 2 tubes also, the one on the right goes to the Cali. emissions junk... I blocked it off when I removed the killer Cali. emissions junk...
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post #10 of 13 (permalink) Old 08-22-2013, 10:45 AM Thread Starter
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So I can buy a tank without that extra metal tube? I figured it may be a vent or something but wanted to make sure if I got another tank without it, that it wouldn't cause a problem while running.
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