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Benjammin'
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421 Posts
Discussion Starter #1
I do not know how gas flows into our reserve tanks, so I have a question; Does it help to occasionally run our bike on reserve when plenty of gas is in the tank to 'flush' old, stale gas out of the reserve system? I refilled my bike today when it was really low on gas (I wasn't on reserve yet), but I wondered if the gas ever gets replaced in the reserve portion of our tanks.
 

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Addicted to Projects
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545 Posts
As I understand the system, the reserve is just the last bit of fuel in the bottom of the tank. When you put more in the fuel is all mixed and fresh fuel is there.
No need to run it on reserve to "refresh" the fuel.
 

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Love My Baby
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1,165 Posts
That may not be entirely true. Depending on the quality of the gas and how long the gas sits in the tank, there may be some gummy deposits building up in the tank, and they may tend to sink to the reserve portion of the tank. When you refill the tank, those deposits may mix, but they will soon sink back to the bottom and the deposits may continue to build. I know some who routinely keep their petcock on reserve so the gas that's burned first is from the lowest portion of the tank, minimizing the accumulation of deposits. Got to be careful if you do that though, or you might run out of gas unexpectedly.
 

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Registered
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60 Posts
There is only one gas tank. The petcock has a one tube that sticks up about a inch or two from the bottom of the tank and the other tube draws gas from the very bottom of the tank. There is ascreen on each of these to keep the big crap from going to the carbs.
 

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and the Adventure Cycle
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6,141 Posts
X2 on what Ruby said :smiley_th
There is no reserve "tank", just that the fuel pick-up line is a little shorter.
So, when the "On" position runs outta gas, the "Reserve" still has some.
 

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Benjammin'
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421 Posts
Discussion Starter #6
Excellent. Thanks folks. I got a much better picture of the "reserve".

I think it may be wise to run the bike on reserve for a while on occasion to make sure it all is the same gas, even in the lower parts of the tank. I guess the down side in doing that is- it will probably put more crap in my reserve side filter screen.

Man, I love this site!!!

Thanks.
 

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Super Moderator
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11,815 Posts
It is always a good idea to run the bike now and then on the "reserve" setting, to simply keep the reserve tube clean.

Do note that if the gas is contaminated with water, the water sinks to the bottom of the tank, so, in theory, if you never use the reserve you could be collecting more water in the bottom.

Just be sure to remember to switch it back to run , as nothing is as annoying as finding you are running out of gas and reaching down to find out you are ALREADY on reserve.

KM
 

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Premium Member
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2,850 Posts
I leave mine on reserve, and did the same on my last bike. I don't mess with it, and let my fuel gauge be my guide. Riding around the city, or just outside of it where gas stations are plenty, it's not been any problem for me. ;)
 

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ExNewbie..Still Learnin'!
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256 Posts
I'm not sure I buy the "sinking deposits" theory (no offense intended, maybe some rust in the tank?) but Knife's right on the water settling. That comes naturally from condensation from the air inside the tank. Specially in the spring/fall when it's cool and the water vapor may not get a chance to evaporate before dripping into the gas. Run on the reserve occasionally to make sure everything works and keep dosing good ol' Seafoam on a regular basis and you should have yourself a clean tank/fuel system that's full of dry gas.
 

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ExNewbie..Still Learnin'!
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256 Posts
I leave mine on reserve, and did the same on my last bike. I don't mess with it, and let my fuel gauge be my guide. Riding around the city, or just outside of it where gas stations are plenty, it's not been any problem for me. ;)
Thank God for the Kawasaki engineers who designed the gas gauge into the instrument cluster! It's one of the reasons I decisded on this bike. Easy to read, right up where you can see it with a quick glance!
 
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