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post #1 of 9 (permalink) Old Jan 13th, 2010, 9:17 pm Thread Starter
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AUX fuel cell

I'm asking for some input on auxiliary fuel tanks to put on the back of my GT. Also, if anyone knows somebody wanting to sell one please let me know.

Thanks, Mike

Mike
MSF Instructor
MOA #145649
2009 K1200LT
2007 K1200GT Traded
2005 Ultra 80,000+ miles
2004 URAL *SOLD*
1996 K1100RS *SOLD*
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post #2 of 9 (permalink) Old Jan 14th, 2010, 10:17 am
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There are two basic options.

1) Build a custom fuel cell like Jeff Earls did. There's some great info in this thread.



2) Buy an off-the-shelf fuel cell, and then make custom mounting brackets like I did.

I got a 5-gallon black plastic fuel cell from Summit Racing for under $100. Then spent less than that much again on hoses, fittings, and metal for brackets. Obviosuly there are many shapes, sizes, and materials for fuel cells, but the square version fit well in place of the passenger seat. Plus I wanted to be as close to the IBR's 11.5 gallon limit as possible. The cell measured out as 5.14 gallons with the anti-slosh foam in place, giving me a max of 11.44 gallons. Whew.




Ken
Pacific NorthWet
'13 Dark Graphite Metallic K16GTLD, 24K miles and counting...
'09 Magnesium Beige Metallic K13GT, 60K miles miles and counting...
'02 Mauve Metallic K12LTC, 106K miles and sold
BMWLT#145, IBA# 366, MOA# 111996, SCMA# 24032

All lower 48 states plus Alaska on the K13GT in two weeks . . .

Some people see the gas tank as half empty. Some see it as half full. All I care is that I know where the next tankful is coming from...

Last edited by Meese; Jan 14th, 2010 at 4:05 pm.
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post #3 of 9 (permalink) Old Jan 14th, 2010, 11:20 pm Thread Starter
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Thanks Ken, the one on Summits website doesn't look as square as yours. Is yours a different model?

Mike
MSF Instructor
MOA #145649
2009 K1200LT
2007 K1200GT Traded
2005 Ultra 80,000+ miles
2004 URAL *SOLD*
1996 K1100RS *SOLD*
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post #4 of 9 (permalink) Old Jan 15th, 2010, 12:10 am
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The Summit link is the exact fuel cell that I bought. It's 13" x 13" x 8" with a small sump area. I went with that one so I could still open the factory 49L trunk, although it pushed me a little farther forward than I wanted to. That's why I later removed the factory luggage rack and moved the cell back 2", then added a different style trunk.

You can use a smaller sized fuel cell, or get a taller/wider one, or look at the other options in metal, etc. Really, it depends on what's most important for you, and how good you are at fabricating mounting brackets.

Ken
Pacific NorthWet
'13 Dark Graphite Metallic K16GTLD, 24K miles and counting...
'09 Magnesium Beige Metallic K13GT, 60K miles miles and counting...
'02 Mauve Metallic K12LTC, 106K miles and sold
BMWLT#145, IBA# 366, MOA# 111996, SCMA# 24032

All lower 48 states plus Alaska on the K13GT in two weeks . . .

Some people see the gas tank as half empty. Some see it as half full. All I care is that I know where the next tankful is coming from...
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post #5 of 9 (permalink) Old Jan 15th, 2010, 6:54 pm Thread Starter
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Ken, how did you plumb it in and if you did it again would you change anything?

Mike
MSF Instructor
MOA #145649
2009 K1200LT
2007 K1200GT Traded
2005 Ultra 80,000+ miles
2004 URAL *SOLD*
1996 K1100RS *SOLD*
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post #6 of 9 (permalink) Old Jan 16th, 2010, 11:56 am
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I used a step-bit to drill an accurate hole in the lowest rear portion of the tank, then used a threaded plug with a 90 degree fitting to just clear the front seat adjuster bar.

I'd rather have made the connection in the fuel pump plate at the front of the tank instead of drilling the tank itself, but there just wasn't room up there.

Here's a couple of pics of Jeff's setup. His fitting is mounted up higher than mine, and he used a tube 90 instead of a more compact block 90 like mine. But obviously, both setups work just fine.




Ken
Pacific NorthWet
'13 Dark Graphite Metallic K16GTLD, 24K miles and counting...
'09 Magnesium Beige Metallic K13GT, 60K miles miles and counting...
'02 Mauve Metallic K12LTC, 106K miles and sold
BMWLT#145, IBA# 366, MOA# 111996, SCMA# 24032

All lower 48 states plus Alaska on the K13GT in two weeks . . .

Some people see the gas tank as half empty. Some see it as half full. All I care is that I know where the next tankful is coming from...

Last edited by Meese; Jan 16th, 2010 at 12:15 pm.
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post #7 of 9 (permalink) Old Jan 17th, 2010, 8:06 pm Thread Starter
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Did you use an electric pump or does it use it as just one big tank?

Mike
MSF Instructor
MOA #145649
2009 K1200LT
2007 K1200GT Traded
2005 Ultra 80,000+ miles
2004 URAL *SOLD*
1996 K1100RS *SOLD*
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post #8 of 9 (permalink) Old Jan 18th, 2010, 1:00 am
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Location: Oxnard, CA, USA
Posts: 3,140
It's a gravity feed, no pump. Much simpler and more reliable that way. There's a manual ball valve at the front left corner, which must be closed before filling the aux tank or else all the fuel will simply overfill the main tank and run out the normal overflow.

When the low fuel light comes on I reach back with my left hand, flip the lever 90*, then watch as the main tank slowly refills and the light goes out.

It takes about 20 minutes to transfer the 5 gallons through the 1/4" hose, but that isn't a problem as you can't burn the fuel up that fast anyway. Although fuel starts to flow as soon as the lever is flipped, it can take 5-8 minutes for the main tank gauge to register a change. That can be unnerving the first few times.

The real trick is knowing when the aux tank is full and when it's empty. Nothing worse than riding through the low fuel light and reaching back, only to find that you've already flipped the lever 200 miles ago . . .

Ken
Pacific NorthWet
'13 Dark Graphite Metallic K16GTLD, 24K miles and counting...
'09 Magnesium Beige Metallic K13GT, 60K miles miles and counting...
'02 Mauve Metallic K12LTC, 106K miles and sold
BMWLT#145, IBA# 366, MOA# 111996, SCMA# 24032

All lower 48 states plus Alaska on the K13GT in two weeks . . .

Some people see the gas tank as half empty. Some see it as half full. All I care is that I know where the next tankful is coming from...

Last edited by Meese; Jan 18th, 2010 at 11:00 pm.
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post #9 of 9 (permalink) Old Mar 14th, 2012, 1:38 pm
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Hi guys...

I am trying to get everything together to put on a fuel cell but I have a few questions....

1) Mike - did you put one on your bike?
2) Where did you drill the tank and put that little fitting on?

3) - KEN - did you ever have any issues with the location of your fitting?

4) How did you clear the back seat?

My concerns are - I have the Gerbing lead and Auto Com lead coming up from under the front seat. I'm worried that I would get a cord or something caught on that little fitting and damage it or pull it loose or something. I don't want to ride down the road leaking gas everywhere. OR is this a silly thought???

I'm also trying to KEEP the rear seat as I have the Fuzblok and the AutoCom base set up under the seat so I want to keep it as protected as I can, so I'm trying to keep the rear seat in place. I have a spare rear seat, that I can mess with and take some of the foam out so it's a little lower. Right now the seat is higher than the side bars so the tank doesn't sit flush.

ANY suggestions, pictures, comments or whatever, are more than welcome.

Thanks in advance....
Tina

2010 K1300GT My beloved ROCKET!!
IBA #37898
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