fuel capacity for Standard

[Lunatic]

what is the fuel capacity of a XS1100 Standard tank? We are entered in teh <Mn2K this year and including the fuel cell capacity can't exceed 11.5 gallons. Need to know tank capacity so we can make sure the cell size doesn't put us over the limit.

[papanovember]

Fuel capacity

I believe it is 5.5 gallons for the standard. I have a standard 79 that I aquired the 6.5 gallon venturer tank. I also fabricated a 4 gallon aluminum aux tank that hides in my back trunk. So. I have 10.5 gallons. I just have to stop to pee, but can ride all day!

[fredintoon]

what is the fuel capacity of a XS1100 Standard tank? We are entered in teh <Mn2K this year and including the fuel cell capacity can't exceed 11.5 gallons. Need to know tank capacity so we can make sure the cell size doesn't put us over the limit.

Hi Lunatic,
Clymer's says the Standard's fuel tank capacity is 5.3 USG (20 liters)

[Ken Talbot]

Of course, the 'H sold in Canada as the Trans Canada has a fuel tank coming in with 6.3 US gal (24 litres, 5.3 Imp gal).

[CatatonicBug]

I believe it is 5.5 gallons for the standard. I have a standard 79 that I aquired the 6.5 gallon venturer tank. I also fabricated a 4 gallon aluminum aux tank that hides in my back trunk. So. I have 10.5 gallons. I just have to stop to pee, but can ride all day!

Do you have any details/pics/specs on that setup? Is it removable, so you can use the trunk as a trunk if you want? How do you have it plumbed? I'm interested in the possibilities.

[cywelchjr]

Do you have any details/pics/specs on that setup? Is it removable, so you can use the trunk as a trunk if you want? How do you have it plumbed? I'm interested in the possibilities.

Me too! I can see some real possibilities for that!

[CatatonicBug]

Me too! I can see some real possibilities for that!

I did a little searching and found this thread from 2007 where it was described a bit. Too bad Maximan's pictures are gone from the thread...

I also, just recently, got my aux fuel cell up and running. It is a gravity feed 4 gallon tank mounted inside a fiberglass luggage trunk. I installed the on/off/res petcocks from MikesXS and gravity feed the four gallons FIRST, then turn on my main tank(81 6.4 gallon). This way, I get rid of the bulky 4 gallons first, then have my fuel gauge for the remaining 6.4 gallons.

One thing that concerns me is the weight of 4 gal of fuel on the luggage rack. The Vetter trunk has a weight limit of 20 lbs total, and that's the weight of 3.2 gal. (fuel weighs 6.25lbs/gal), not including the aluminum tank. Although, the fact that the aux tank is used first might make the temporary over-load negligible.

I am still curious to see some pics of the setup though.

[Lunatic]

In the past

in the past sidecars were allowed to run over 15 gallons in events, this year we have been reduced to 11.5. So the 4 gallon cell and the 3 gallon cell that I ran in addition to the main tank are no longer allowed.
I'll try to find a 3 gallon to put with the other 3 gallon or find a 6 gallon cell and just use that. In the past I put the 4 gallon on the rear rack and the 3 gallon on a bracket mounted above the rear seat, but if its just a 6 gallon, then I'll modify the rear rack and make the cell hang half on the rear rack and half above the rear seat.

[papanovember]

4 gallon fuel cell

Basically, I already had a luggage rack that(I think) was for the XS1100 Standard. Then, I purchased some universal trunk on Ebay. I went to a marine catalog and replaced the lock with a stainless one. Then, during a mockup session, I fashioned the biggest fuel cell, out of cardboad, I could fit and still close/lock the trunk. The cardboard mockup also included the mounting points(basically tabs) that would secure the fuel cell inside the trunk. I then took the cardboard mockup to my local welder and had him fab the cell out of aluminum.
Now, every bike is different, so I spent many trips to the hardware store playing around with different mounting hadware. I mounted the trunk to my luggage rack using stainless u-bolts drilled through thru the bottom of the fiberglass trunk and secured it to the rack using flat rectangular pieces of metal underneath the metal rack. The fuel cell had four tabs, and those were drilled through the bottom of the trunk.
As for pluming, I purchased a fuel filter coming out of the bottom of the fuel cell, an on /off valve, and several feet of stainless braided fuel hose. This was carefully snaked though the bike with the seat off, being careful not to have any rub marks on the hose. I then teeed the aux fuel line into my carbs. Switced to Mikes XS on/off/reserve petcocks and got rid of the stupid vacuum petcocks.
Then when I begin a ride, I shut the easily reachable tank mounted Mikes XS petcocks and open the aux valve. When the bike starts to studder after using the four gallons, I just reach down, open each petcock and I now have a fuel gauge to let me know when to stop for gas.
I should also note I bought a brand new set of $1200 carbs that was a perfect fit for the intake manifold. Just had to move the airbox forward a tiny bit. I bought the carbs from a place that specializes motorcycle carbs. I think it was motorcyclecarbs.com(phone 770-9748841). Fitting thess carbs I has one problem. I had to put a reducer jet in the vacuum line to make it run right. I also did the 1179 kit. I've been riding XS1100 Standards since 1996. First was a 78(wsh I never sold it!). My current is a 79.
One more note about the aux tank, It has to have a top vent. And I also got some cool quick disconnect fittings(CPC I think) that allows me to take my main venturer tank off for maintenance in a snap. As for easily removing the aux tank, I could have engineered a better system with some locknut wing washers. But I never really take it off, and there is a surprisingly good amount of storage for small items in the trunk around the aux tank.
Also, I never had any structural problems or weight imbalance because I'm usually loaded up with a dry bag behind my back. I also made custom aluminum saddle bags with stainless hardware. I have a vetter windjammer and when I'm not touring the aux tank stays empty. Hope this helps, papanovember.