Soda Bottle Fuel Tank Adapter

W

wileydavis

New Member
Just a pic of the adapter I made to use a soda bottle with my EH035 engine. Uses the standard POC 1881 bottle size.

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The beer greases the wheels, the Mt. Dew motivates.

Actually, the whole need for this was my tours often require shipping the bike or traveling on a bus or a train. None of those allow containers that have had fuel in them. No gas tanks allowed. So this allows me to arrive, unpack the bike, buy a bottle of soda, drink it, then just use that as my fuel tank. No hassles with shipping that way.

Every 7-11 keeps an assortment of fuel tanks in stock.
 
Market this item. I would buy one if the price were right, just because I love way out gas tanks. Make them out of plastic even.
 
There was a guy that posted the question a while back if anybody had an easily removable fuel tank. It sounds like you solved his problem with great aplumb.
 
Deacon. If you PM me a shipping address, I'll send you one for free to test if you'd be willing to give feedback. (I made a few...the joys of cnc).
 
Looks good to me , maybe you could just mod the plastic cap that they come with ,maybe with some brass fittings
 
That would work. The problem, though, is that the seal in the cap wasn't designed for very many seal/unseal cycles. So you'd probably have to make a new one every so often. Plus the caps are thin, so getting a stout connection with the fittings is difficult.
 
Tell you what, I am in the middle of testing a bike. I am going to need a new tank so give me a day or two to figure out the placement and I'm all for it. I love to give feed back. Can you mount the battle on it's side or does it have to be straight up.
 
Deacon: Side-mount should be no problem. Even upside down will work. it's an air-tight seal. If you're not using a diaphragm type carb with a return line, you'll need to run a vent hose someplace higher than the top of the fuel level. I'll include a drawing.
 
Maybe I can fill the bottle about 3/4, then put the plug on and use the air trapped inside the bottle to force the gas out if I have it high enough. Maybe it won't lock up. Why not put some water in a bottle about 3/4 full put the cap on and see if it will run out freely without a vent. That would give us the answer wouldn't it.

Also I bet that is the same size lid as an oil bottle, which is heaver than the coke bottle. I can also play around with it to see what all it will fit. I like this idea more all the time.
 
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The nice thing about the soda bottle, is that it was designed to be pressurized. A soda bottle is an amazingly strong thing. A water bottle or an oil bottle is not designed to hold pressure, which can occur when your tank heats up in the sun.
 
I see what you mean. Yes it has the single big line like the china kit line. The vent shouldn't be a problem if the big line will seal on the small fitting.
 
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It the 1/4 inch line yes and I can figure a vent out no problem. I just needed a minute to think about it. I have plenty of the really small tubing I'll just plug one and put a pin hole in the line near the end the run it along the bottle. So that when it flips it will be above the gas level.
 
After I cranked on my new 3.5 hp friction drive bike for fifteen minutes without it starting more than a second at a time. If finally hit me to check the gas tank. You guessed it, too dry to start. I am truly looking forward to your adapter sir. I have already picked out a 24oz diet coke bottle for the first gas tank. I also had an idea after I finish the others in the pack, I am going to wash, dry and save them, even the caps. I can fill them with gas reseal the tops and carry them on longer rides. When the tank runs dry, I can toss it and install a whole new one by just changing lids. That will be the cat's meow.
 
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Just don't use the mtn dew bottles! They can melt for some reason (something in the gas). I used to carry cola bottles full of gas for my job weed-eating at a cemetary.

I like the idea of an adapter for soda bottles, but maybe you are missing the obvious: Coke bottles are often used as spare fuel bottles because the caps seal tightly and are reusable for a while. How about a METAL, threaded cap for this purpose?

Here is something I'm going to try out:
image2.aspx
http://www.bikepedia.com/Images/image2.aspx?w=300&h=300&filename=WBTC1730.jpg&f=Hawley

Water Bottle Used As Spare Gas Tank ? - Page 3 - MotoredBikes.com: Motorized Bicycle Forum
 
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