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General Category >> Rubber Side Down! >> what the heck is on my tank?
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Message started by seviersavage on 12/05/08 at 06:34:17

Title: what the heck is on my tank?
Post by seviersavage on 12/05/08 at 06:34:17

I purchased a kawasaki vn750 tank to mod to my savage, basically similar dimensions but nearly another gallon. And it comes with a fuel gauge. But looking at the tank there is a line coming off the back where the seat will but up to it. What the heck is that? It looks like it had a gas or vacume line attached to it. I plan on cutting it off and welding it closed but am I gonna get in trouble doing that?
Anybody tell me what that line is?
Seviersavage

Title: Re: what the heck is on my tank?
Post by Tincanman on 12/05/08 at 06:59:34

how about a pic of it so we know what were looking at??

Title: Re: what the heck is on my tank?
Post by Demin on 12/05/08 at 08:00:57

It's probably a vent line.If you look right where your gas cap goes into the tank,is there a little hole there?If so that line goes up to there.If so it's an unvented gas cap.So your overflow doesn't hit the engine.

Title: Re: what the heck is on my tank?
Post by verslagen1 on 12/05/08 at 08:18:37

run some water thru it to see where it comes out.
as said most likely a vent line to some epa device.

Title: Re: what the heck is on my tank?
Post by seviersavage on 12/05/08 at 08:22:00

So does anyone see any problems just closing it off if it is a vent line?
Seviersavage

Title: Re: what the heck is on my tank?
Post by Demin on 12/05/08 at 08:39:02

Yep,no vent,nonvented gas cap.Nowhere for vapors to escape,BOOM.Or if you're lucky the rubber seals in the petcock will fail,and just leak.

Title: Re: what the heck is on my tank?
Post by seviersavage on 12/05/08 at 09:17:30

BOOM, don't like that so much. I believe I'll rethink this a little.

maybe that little vent lines not so bad after all, maybe I can turn it down sooner and run it somewhere to the ground? or maybe into a charcoal canister? :-[
Seviersavage

Title: Re: what the heck is on my tank?
Post by 88pagan on 12/05/08 at 12:50:33

No pix yet?

Title: Re: what the heck is on my tank?
Post by seviersavage on 12/06/08 at 07:49:59

Try to get a pic up tonight, at work right now.
Seviersavage

Title: Re: what the heck is on my tank?
Post by seviersavage on 12/06/08 at 15:51:00

O.K.
Here is a pic of the rear of the tank and the line coming off of it, On close examination I think I can circumvent Kawasaki's venting system and turn a non vented gas cap into a vented one. But if I don't have fitment conflicts I'll just leave it alone. Could I just run a line down the frame and leave it open or maybe cap it off with a small aquarium charcoal filter?
Seviersavage
http://w4.bikepics.com/pics/2008/12/06/bikepics-1502656-240.jpg

Title: Re: what the heck is on my tank?
Post by verslagen1 on 12/06/08 at 16:03:58

How's it fit on the bike?

Title: Re: what the heck is on my tank?
Post by Demin on 12/06/08 at 16:06:25

I would just run a line to the bottom of the bike,and call it done.It's just a vent.Our carbs just vent behind the battery box,and the cap just vents out.