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Posted by rwantin
 - September 19, 2016, 07:41:40 AM

Swapped the lines, added more gas, rode in to work today, all appears well (except for the vibration thing, but I'll keep working on it).

Just wanted to say thanks a ton for your help.

Posted by Troll
 - September 14, 2016, 15:47:41 PM

Got to be one of them.

Posted by rwantin
 - September 14, 2016, 10:52:25 AM

Hi Troll,

There is a vent near the top of the tank, though I think that is outside the cap seal and just for slosh overflow.  I'll take a closer look when I get home.

The blue dot is the one I have capped off - in looking at your diagram, it possibly vents near the top of the tank.  If that is the case, it's worth trying to reverse it - cap the red dot (that is the one running gas to the ground), and venting the blue one.  Worth a shot.

And I really appreciate your help, sir.

Posted by Troll
 - September 14, 2016, 09:50:52 AM

Is there another available line that will vent the tank? Seal off the leaker and be sure you can get air inside.

Posted by rwantin
 - September 14, 2016, 09:18:00 AM

Thanks again.

It is definitely coming from the red-dotted outlet (the line that had the same resistance as the single outlet original tank).  That line, as with the original tank, runs to the ground.

Posted by Troll
 - September 14, 2016, 08:47:56 AM

1st thing is to determine where the fuel is coming out when you fill it, second is to be sure you have an atmospheric vent that won't leak fuel

Posted by rwantin
 - September 14, 2016, 05:50:51 AM

Sorry for the delay, this stupid work thing keeps getting in the way!

Should I try venting the second line to the ground?  Re-route it to the overflow vent to the upper part of the tank?

Thanks for your patience.

Posted by Troll
 - September 12, 2016, 18:18:37 PM

All you need is an atmospheric vent, fuel out, fuel in and a couple of overflow lines for the area under the cap and the sender "just in case"

Posted by rwantin
 - September 12, 2016, 16:54:32 PM

Thank you.  That is very helpful.  Good to know on that sending unit line.  I was like, what the heck?

I have no problem with removing the tank.  The fuel does appear to be coming from the red return line which is routed down to the ground.  There is a line at the front of the tank up near the top which both tanks have (and I have hooked up), I'm guessing that's for slosh or overflow.

I noticed when swapping the pump both the the red and the blue have steel lines internally in the tank.

I'm studying the diagram - wonder what would work short of buying those evap components.  I'll have to think this through some more, and welcome any other thoughts.

Again, MUCH appreciated.

And I know I probably shouldn't worry about the bother thing - and get this is a forum.  It's just a weird one, and just my luck I ended up with a Cal-spec tank.

Posted by Troll
 - September 12, 2016, 14:51:04 PM

I know it's a pita, but you will have to raise the tank up enough to see under it and put in some fuel. The fuel gauge sending unit hose is an overflow if the sender leaks, and on mine, it just goes out to the atmosphere through one of the three hoses clamped by the oil filter. The hose at the rear of the tank is an overflow from the cap area. Here's a diagram of the california emissions hoses

Posted by DC
 - September 12, 2016, 14:10:45 PM

Hopefully it's not a crack in the tank.

Posted by CDNRatMan
 - September 12, 2016, 13:20:50 PM

 8) rwanting, please do not fret about asking questions, it just makes the 1500 crowd think and ponder, and they love a problem to solve....... :o

Posted by rwantin
 - September 12, 2016, 09:43:54 AM

Hi again,

And again, thanks for the guidance.

I attached a line and blew through the single vent on the original tank, with medium resistance.  Identified the exact same resistance on the new tank, and capped off the other.

All seemed well until I added some gas.  A small pool formed below the bike.  It stopped once I stopped adding gas and closed the cap.  The bike runs fine, and no gas from the bottom.  In some wishful thinking, I hope that was just from adding gas to a brand new tank.  I just stopped at the station to fill up, more pooling at the bottom of the bike, bigger.  I stopped before I could get two gallons in.

Rode it home, popped the cap, nothing.  Started it again, nothing.  Started it with the cap open, nothing.  It appears to happen only when I am adding gas.  So I am thinking along these lines.

-Swap the line?  This doesn't seem right, as the resistance is exactly like on the original tank.
-Vent the second line to the ground?
-Do something with this mystery line to the plastic cap on the sending unit?  Cap it?  Put it on the second vent?

Sorry about the bother, really want to make this tank work.  Any thoughts way beyond greatly appreciated.

Posted by rwantin
 - September 10, 2016, 05:13:51 AM

Thanks!  I'll give it a go today.

Posted by Troll
 - September 08, 2016, 19:54:22 PM

Blow through each one and find the one that most closely works the same as the original tank, and seal off the others

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