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Re:How To Drain Gas Tank
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TOPIC: Re:How To Drain Gas Tank
#882008
Razorback (User)
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How To Drain Gas Tank 2 Years, 10 Months ago  
Hey guys,

I have a stock 2000 Road Star that I am wanting to drain the fuel tank because I am not sure when the last time reserve was used and don't want any surprises getting to the carb. What is the best way to do this? I am not interested in removing the tank.
 
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#882012
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Re:How To Drain Gas Tank 2 Years, 10 Months ago  
The reserve is not a separate tank, it is just a different height pickup tube coming off the petcock that draws gas to a lower level in the tank. So when you add new gas it mixes it all together.

Woody
 
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#882013
Tug (User)
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Re:How To Drain Gas Tank 2 Years, 10 Months ago  
If you have a piece of spare fuel line then use it. If not pull it off of the back of the carb and run it to a gas can and open the petcock to reserve and let it drain. Leave the bike on the side stand
 
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#882014
Curt (Moderator)
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Re:How To Drain Gas Tank 2 Years, 10 Months ago  
Get a long piece of rubber fuel line about 2 ft long. Pull the regular fuel line off and put the 2 ft piece on. Find a large enough gas can to hold the fuel in the tank to drain it in (I have a 5 Gallon plastic one) Turn the petcock to reserve and leave it there that will drain the whole tank.
 
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#882022
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Re:How To Drain Gas Tank 2 Years, 10 Months ago  
Easiest is a spare piece of fuel line connected right at the petcock. The reserve is not a separate cell, as mentioned, and fuel does mix, but our fill port is on the opposite side of the petcock sump, and any water or emulsified fuel is going to be pooled on that side. Once an emulsification is present, it is difficult to break up without direct churning action, and even then, the water is in much larger droplets than it is in "normal" fuel contamination. Typical concentrations of water in fuel are 5-7 PPM water. This can only be detected with a special machine that I used to get to use ALL the time in the military for remote fuel sources. It was not unusual for un-stirred fuel in bladders to have water concentrations over 50ppm before being "stirred" by churning it up in a recirculation loop with the pump. We had to "stir" until a value of 10ppm or less was achieved.
While all these values represent suspended water content, it is quite possible, and somewhat common, for large droplets of water to be present in gasoline. Water is the number one contaminant of gasoline. Silica is number two. They account for nearly 80 percent of contaminants found in fuel, so "bad" fuel stands a huge chance of being water saturated fuel. I run every tank of fuel to reserve, so mine is constantly being used. The odds of getting enough water in a single 4 gallon or so fill up are incredibly low, but it does happen occasionally, and always remember, if condensation has formed on the outside of your tank, it has on the inside too, so when you go sit down by the lake all night and sleep under the trees and your bike is all covered in dew in the morning, the gearbox and the fuel tank have gotten their fair share as well.
 
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#882125
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Re:How To Drain Gas Tank 2 Years, 10 Months ago  
Going by what I have read here on the way Warden changes oil, I would venture to say first you pull the engine...............
 
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#882130
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Re:How To Drain Gas Tank 2 Years, 10 Months ago  
LIGHTNIN wrote:
Going by what I have read here on the way Warden changes oil, I would venture to say first you pull the engine...............

Hey, it works!
 
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#882145
signalzero (User)
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Re:How To Drain Gas Tank 2 Years, 10 Months ago  
I will be the first wise ass..... the answer is ride it.
 
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