Gas tank question

Discussion in 'Tech Area' started by Turqui, Feb 6, 2020.

  1. Turqui

    Turqui Member

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    Hi there, i have a few z50 wich I won’t be using anytime soon. Im planing to remove the original tanks for storage and wen ever I want to ride them just use a few aftermarket tanks I purchased.
    Tanks presently have some gas, im going to empty them.
    How is the best way to store them to avoid rust?
    Put Any oil inside?
    Brand? Viscosity? Best oil to be used?
    Should i clean them for any gas residual?
    Product?
    Suggestions please.
     
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  3. racerx

    racerx Administrator
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    Fogging oil, or Kroil. Just get them dry before application.
     
  4. MiteyF

    MiteyF New Member

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    The absolute BEST way to keep rust off of the inside of your tank is to coat them in POR-15. Very permanent, and completely prevents rust.
     
  5. cjpayne

    cjpayne Well-Known Member

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    I think it was Mike Warner who found an old SL70 that was stored for years and had the tank filled with transmission fluid. Once drained and rinsed with gas, the entire fuel system looked perfectly preserved. The inside of the carb looked brand new.
    When I stored a K1 that I had for about 2 or 3 years, I drained all the gas and sprayed about half a can of WD40 into the tank and shut the valve. It worked.
     
  6. racerx

    racerx Administrator
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    ATF seems to be viewed as a magical fluid by some; that's nothing more than urban legend. Motor oil, kerosene, WD40, fogging oil, Kroil, axle grease...among other petroleum distillates would work equally well sealing-out oxygen and thereby preventing rust. The main differences are in ease of cleaning it out, come next riding season. I'll go a step further, downstream of the tank itself, anything but dry storage is a bad idea. The petcock packing is the sole exception; oiling that prior to storage limits shrinkage. Rubber that's been exposed to pump gas will shrink, if allowed to dry out. Fogging oil is, hands-down, the best choice for storage-proofing a gas tank; it'll also be the easiest to clear from the system, having been formulated for the purpose.

    Circa 2020, real gasoline - as it existed prior to 2006 - has all but vanished. E10 pulls water from the atmosphere, but it's not the only oxygenate in gasoline. Short of buying gasoline from a specialty supplier such as VP Hydrocarbons, or filing-up at an airport, rust and short shelf life are all but inevitable. Personally, I won't run an unsealed metal tank anymore. (I seal brand-new tanks, prior to installation) As for sealers, POR-15 is the most forgiving and damned tough material, once applied. The downside is that the dark silver color tends to camouflage dirt and gasoline contains more garbage every year. KREEM is a temperamental product; if not applied to a perfectly-prepped surface, it will peel. The white pigment, however, makes it very easy to see how much crap has accumulated in the tank...as well as how thorough your cleaning really is.
     
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  7. kirrbby

    kirrbby Well-Known Member

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    I'd have no qualms at all about coating all of my steel tanks, except...most of my Z50 tanks are originals, with original paint, AND non original dents and dings. I won't coat a tank if I know there are dents that someone might eventually want to remove. A Z50 tank would really need to be straight first, then clean, then sealed...then painted if necessary.
    My dented originals have WD-40 in them...because that's what I have handy.
     
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