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Main Area => General GS500 Discussion => Topic started by: JohNLA on February 02, 2004, 01:14:03 PM

Title: How to hook up Auxiliary fuel tank 4 carb synch???
Post by: JohNLA on February 02, 2004, 01:14:03 PM
I just bought a Auxiliary fuel tank like the one Kerry's got. Where should I run the hose from the Auxiliary fuel tank ?
Title: How to hook up Auxiliary fuel tank 4 carb synch???
Post by: Kerry on February 02, 2004, 01:40:42 PM
I bought a coupler at the auto parts store and used it to connect the hose from the overflow container with the RES line that I took off of the fuel tank.  (The ON line will work fine too, unless you're low on fuel .)

The exact model you get will depend on the two hoses you need to hook together, but here's what mine looked like:

(http://www.bbburma.net/MiscFotos/DSCF2451_HoseCouplerInPackage.jpg) (http://www.bbburma.net/MiscFotos/DSCF2452_HoseCouplerAttached.jpg)

Actually, I had a VERY TOUGH time fitting this connector onto the clear hose.  I ended up getting a different connector with both ends the same size.  It was white plastic, but I'm not sure if it was a 1/4" diameter or a 5/16".  (It's at home....)

If you can "try before you buy" that would be great.

EDIT: Changed links from sisna.com to bbburma.net
Title: How to hook up Auxiliary fuel tank 4 carb synch???
Post by: JohNLA on February 02, 2004, 01:45:31 PM
Thanks Kerry, I understand now :thumb:
Title: How to hook up Auxiliary fuel tank 4 carb synch???
Post by: Kerry on February 02, 2004, 01:58:29 PM
Sure thing.  I just went back and looked at the picture of my aux. tank "mounted" on the mirror, and you can actually see the connector hooked into the RES line:

http://www.bbburma.net/MiscFotos/CoolantReturn_Mounted.jpg

EDIT: Changed link from sisna.com to bbburma.net
Title: How to hook up Auxiliary fuel tank 4 carb synch???
Post by: JohNLA on February 02, 2004, 02:03:28 PM
Aaaargh :x
They changed the location of the vacuum inlets. Maybe, bikebandit can shed some light.
Title: How to hook up Auxiliary fuel tank 4 carb synch???
Post by: JohNLA on February 02, 2004, 02:20:48 PM
If any carb gods care to give it a try. Here is a link to my 02 carbs
http://houseofmotorcycles.bikebandit.com/partsbandit/oem_schematic_view.asp?schem_dept_id=723022&section_dept_id=1&section_dept_name=OEM+%28Stock+Parts%29&dept_type_id=2&model_dept_year=2002&model_dept_mfr=Suzuki&model_dept_id=703278&model_dept_name=GS500K2
Any ideas where the vacuum inlets might be ?
Title: How to hook up Auxiliary fuel tank 4 carb synch???
Post by: Kerry on February 02, 2004, 03:19:18 PM
I bet #40 is the vacuum cap that you need to remove.

Boy, it'll sure be great when you've done this and you can document it for everyone else!   :mrgreen:
Title: How to hook up Auxiliary fuel tank 4 carb synch???
Post by: JohNLA on February 02, 2004, 03:46:16 PM
Thanks Kerry, that is what I was thinking but it makes me feel better that you think so as well. The inlet that mirrors that one has a hose running back to the fuel selector. It does not lead to Pri, Res or On but is the 4th hose to connect.
I was reading on the http://svrider.com/ which has tutorial on carb synching for the older SV's. In that tut he made a T to splice into an exsisting hose. I think that is what I will try.
Here is a pic of that hose.
(http://johnla2.tripod.com/c-synch.txt)
Title: How to hook up Auxiliary fuel tank 4 carb synch???
Post by: Kerry on February 02, 2004, 04:42:44 PM
Whoa, wait a minute.

Between the BikeBandit diagram and your photo, I'm a little turned around.  The vacuum hose in your picture is part #46 in the diagram, right?  But in the diagram it hooks to the LEFT carb (unless I'm totally turned-around) and in the photo it appears to attach to the RIGHT carb.

Am I missing something?

=======================================

While I'm at it, the diagram doesn't seem to show a vacuum takeoff on the RIGHT carb that matches part #40 on the LEFT one.  Or maybe the choke plunger assembly is blocking it.

I'm left wondering which way things really are!  Please select one:Unless you just hooked the synch tool hose directly to the vacuum takeoff and put the fuel selector on PRIme.  :) )

4) According to the photo, the RIGHT carb seems to supply the vacuum to the fuel selector (to pull fuel to the carbs), and the LEFT carb ... well ... um ... I don't know how to finish this sentence...!

5) Perhaps things are configured in a way I haven't listed?[/list:u]Help me understand, John!  :dunno:
Title: How to hook up Auxiliary fuel tank 4 carb synch???
Post by: JohNLA on February 02, 2004, 05:42:19 PM
Now that you point it out I cant find it on the bikebandit schematic :?
I tried taking a picture of part 40 but the choke assembly blocks the veiw but the schematic shows it well. The hose in my photo connects to the right carb at same spot part 40 does, only on the right throttle body. Before I said it mirrored part 40 but I mispoke it is in the same exact spot. Right belowe the number 2 where that thing is floating. I am not sure why the schematic does not show it. :dunno:

"Unless you just hooked the synch tool hose directly to the vacuum takeoff and put the fuel selector on PRIme.  )"
Good Tip :thumb:
Title: How to hook up Auxiliary fuel tank 4 carb synch???
Post by: Kerry on February 02, 2004, 05:59:22 PM
Well, it sounds like both carbs have identical vacuum takeoffs.  One has the fuel selector line attached, and the other has part #40.

Is that right?

If so, then I would try the "trick" I mentioned above:  Unhook the fuel selector line from the right carb and turn the fuel selector to PRIme.  Then hook both hoses from the carb synch tool to the vacuum takeoffs.

I'm anxious to see how well that works!

I also wonder whether that fuel selector vacuum hose could be hooked to EITHER carb.  I don't see why not, unless there is a length or shape problem with the hose.
Title: How to hook up Auxiliary fuel tank 4 carb synch???
Post by: JohNLA on February 02, 2004, 06:03:16 PM
Good my ramblings made since :thumb:
I think you are probably correct about your hypothisis. The problem would be routing the hose around the choke.
Title: How to hook up Auxiliary fuel tank 4 carb synch???
Post by: TheGoodGuy on February 03, 2004, 06:44:12 PM
dont know if you fixed it..
but the vacume hoses on the 2001 is different from the other models.

first they arent the same size, one has a pipe and the other has a cap on it.

they arent located symmertrical.. you can find the one with the pipe easiely, its on the side (not top)

one side is #40 On bikebandits site.. that's the cap, the other side has the pipe on it..
Title: How to hook up Auxiliary fuel tank 4 carb synch???
Post by: JohNLA on February 03, 2004, 07:55:05 PM
Good_Guy, what pipe are you talking about ? Is it the one with the hose in my pic above ? It was larger than the part 40 one. The one leading to the fuel selector.

Update:  The rains and flooding subsided long enough to try the carb synch today.
It worked pretty well.  :thumb:
Although, I could see no effect to using the screw valve Kevin C. recomends. That may be, because I made my synch tool a full 36 inches from the loop to the top and another 36 inches to the carb. I was paranoid about making a shorter one because I had nightmares about getting ATF, in my carbs.
The fluid had a tendency to jump a bit but I think I got them pretty darn close. Only took a 3/4 of a turn to level the fluids. It seemed to easy :nono: . So I turned the balance screw some more and things seemed to be working correctly. Turning one way made the fluid in one side rise and the other side would lower and vice-versa.

I would be all happy, happy joy, joy but me electric gremlin returned today. :x