How to tell if there is water in your gas

I get my gas at the Truck Stop down here in New Brunswick and i heard that there is water in the gas which can make a dirt bike run bad. How can i tell for sure if there is water in their gas or in my gas?  
My ride -2002 KX 125

you can disconnect your fuel line from the carb and fill a glass about an inch deep with gas.  If water is in there it will form into bubbles that seperate from the gas.  Another simple way to see is to remove your carb bowl and look to see if water pockets are in the gas that it contains.  
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NW Montana
Where the pavement ends and the fun begins  
2005 KTM300exc
2001 Honda CR250
1978 Suzuki PE250

ok thanks a lot i will try it! So i put an inch about into a glass and if theres water in it, i should see some bubbles? And it is a 2 stroke with mixed gas will this do any diffrent that the gas is mixed?  
My ride -2002 KX 125

Okay, Your on my last nerve josh lol. Use a reputed station that hi preformence cars use . That way you know that the tanks are re-filled reg.
Other then that....DON"T WORRY ABOUT IT!!!!  
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DIABETES SUX!

why am i getting on your nerv i m just trying to treat my bike to the best and ride! Why shouldn't i worry about the possibilty of water being in the gas going into my bike! lol  
My ride -2002 KX 125

Because i'v awnsered like 5 of your questions today. AND you never awnsered 1 of mine?
You said you would ask your dad.
Thats cool, but watch when giving advice that you have done it and know the consiquenses. I'm Still Waiting on what GRAEASE you use on your chain?
I asked you to PM me, But we can continue this on the board.  
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DIABETES SUX!

yeah i answered you i said i m not sure what kind of grease it is but it is not the "real" lube for chains but it works just fine.  
My ride -2002 KX 125

Well, My advice is not "REAL" advice eather. I'v never even owned a bike.
I just make this crap up as i go along! Mabey we need a chat room to talk about it?  
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DIABETES SUX!

not really i m just saying i use grease for my chain and it works good? Is that a problem or? You can tone the sarcasim down a bit to bud.  
My ride -2002 KX 125

ok ez u 2 plz just calm done you guys we are all friends here in a way so lets not get mad at each other. No ne needs to obsess over there bike ether and no one needs to get on the other ones nerveplz stop plz. ok josh my advice is drain some of your gas into a glass jar ok clear so you can see the gas then wait 10-15mins ok if there is a seperation in the fuel in the glass then you will know there is water if its all the same color then it is nice good gas ok...................yzwoods you help me alot what was your question about chain lube maybe i can awser it for you plz get back to me ok thanks and have a happy 4th!!!!!!!!!!!  
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Autismspeaks.org   check it out
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life in the fast rut!!!!
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my rides- 2008 yz250f fully modified, use to be j-laws bike
        &
IT400 1979 yamaha!!!
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Home: SO CAL

there are 2 kinds of water in fuel.
Simple contamination, Water is heavier than fuel, it will be on the bottom of the sample. As stated above let sample sit for 15 minutes.
There is also comminguled fuel, a water particle will actually bond with the fuel particle. This will cause the fuel sample to be cloudy, no solution here other than to get rid of the fuel and get it somewhere else.  
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S.E. Indiana

1990 KDX 200
2002 KDX 200
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Iv'e been using woods's advice for quite some time now and it's not "REAL" advice!!??  Crap what should I do now.....??!  
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Trev
2008 YZ250

Josh, one way 2 help get good fuel is to buy 5 gal containers from VP or Sunoco, or some other Race-only fuel suppliers. Fuel that comes from a ground storage tank will always have contaminants.  as woods stated, buy from a place that sells performance fuels, but i don't recommend getting it from the ground. unless u live on sunset strip, i doubt ur local hot rod gas station sells enough fuel to always have fresh stuff in their huge underground storage tank.

another, rule of thumb is never get fuel at a gas station which is getting a delivery. they service truck can unload its contents into the storage tank in matter of minutes. that pressure stirs up the contents of the storage tank and if ur getting fuel at the same time u'll most likely get a mixture of fuel and w/e is floating around in there.

the problem lies in the fact that rarely do any of us have the cake to always buy performance "in-the can" fuels.  so were stuck with buying pump.  

YZ ripper don't worry he was being sarcastic. And thanks everyone for the advice, i will definately try it later today and respond.  
My ride -2002 KX 125

Yah I know he was being sarcastic, lol... So was I. Iv'e read lots around here and can tell who knows there stuff. Woods yup, deffinatley knows what he's talking about. Back to this fuel issue. Iv'e always wondered the freshness myself. I usually fuel at station that is frequently used for that reason. Only I use high octane gas and probably most people fueling up don't. So Iv'e always pondered the freshness. Iv'e done the cup test, lol. Everything seams ok thus far.  
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Trev
2008 YZ250