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Condition inside the gas tank 22 Jan 2019 16:28 #797327

  • Nessism
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You want to keep the surface wet at all times. If you don't want to purchase a huge quantity be sure to shake the tank every few minutes for an hour or so and the tank should be clean by then. You can also dilute the phosphate and it will work fine, just slower.

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Condition inside the gas tank 22 Jan 2019 23:51 #797347

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Nessism wrote: You want to keep the surface wet at all times. If you don't want to purchase a huge quantity be sure to shake the tank every few minutes for an hour or so and the tank should be clean by then. You can also dilute the phosphate and it will work fine, just slower.


Just to avoid I misunderstand something, can I just fill the tank completely full and let it stay for 1 hour ?
Or do only want to have the surface wett, so 2 liter is a good number ?

I`m planning to use hot water with the acid, then the effect increase ?
1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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Condition inside the gas tank 23 Jan 2019 00:18 #797348

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I`m planning to use hot water with the acid, then the effect increase ?


dilute the acid with water will extended the time.
2 liter acid is good and let the tank swim into your bathtub filled with hot water, shake and turn the tank every few minutes for an hour.

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Last edit: by Scirocco.

Condition inside the gas tank 23 Jan 2019 01:16 #797349

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Scirocco wrote:

I`m planning to use hot water with the acid, then the effect increase ?


dilute the acid with water will extended the time.
2 liter acid is good and let the tank swim into your bathtub filled with hot water, shake and turn the tank every few minutes for an hour.


The acid has a concentration 70%, need to use som water to get it down to 30%, was planning to use hot water todo that ?
1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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Condition inside the gas tank 23 Jan 2019 02:13 #797350

  • Bozo
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All my motorbikes, Z1R, GPZ11, 2 x FJ1200 have their fuel tanks cleaned and coated with KBS tank paint, The Z1r has had this done 18yrs ago with no problems. It feels and looks like a ceramic surface
(I do not have anything to do with the KBS company)
First Permanent ride the Z1R since Dec1977 (220,000km) as of June 2015
Second permanent bike 1989 FJ1200 dyno'd 140RWH, great bike.
Third ride is now the Frankenstein 1981 GPZ1100B1, getting new/ refurbished 83-84 motor soon
Forth my work bike FJ1200 1989 (same type as above)

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Condition inside the gas tank 23 Jan 2019 05:21 #797352

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30% is the strongest I'd go. Hot water to dilute is good. I don't know exactly how long it will take to remove the rust but I suspect less than one hour.

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Condition inside the gas tank 23 Jan 2019 05:26 #797353

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Nessism wrote: 30% is the strongest I'd go. Hot water to dilute is good. I don't know exactly how long it will take to remove the rust but I suspect less than one hour.


I will try monitor with a camera during the process :)
1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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Condition inside the gas tank 12 Feb 2019 07:33 #798533

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Today have I used phosphoric acid inside the tank.
1. Degreased the tank inside.
2. Flushed with clean water.
3. Added 30% phosphoric acid and turned the tank around each 3-4 minutes for 40 minutes.
4. Flushed the tank for a good while with fresh water, tried to get all water out.
5. Added Isopropyl alcohol turned the tank around for a while, dropped it off..
6. Spayed alot of WD-40 and turned the tank aorund..
7. Used hair draier on the filling whole and let the hot air come out from the level switch and petstock.

I`m 90% happy with the results...

Video`s form after the treatment:
streamable.com/retoz
streamable.com/0kgbt

Video`s form before the treatment:
streamable.com/52t3l
streamable.com/8icrv
streamable.com/sxxdf

Is these good enough for a long term condition... ?
I see many use tank sealer, but I have heard that is really bad if the paint start falls off in the tank...
1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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Condition inside the gas tank 12 Feb 2019 07:54 #798536

  • martin_csr
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For fuel tank storage. I would consider using Snowmobile Fogging Oil. .... wd40 kind of evaporates.




...
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Last edit: by martin_csr.

Condition inside the gas tank 12 Feb 2019 17:20 #798571

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Looks like the tank still needs a little work. A very nice start though. The brown spots are either rust or fuel varnish. I'm not sure which, but it's critical for you to figure what they are because the process for removal is different. For rust you just need a little more time with the phosphate sauce. If they are varnish then you need something like carb cleaner to break through that.

Good luck and keep going...
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Last edit: by Nessism.

Condition inside the gas tank 12 Feb 2019 17:27 #798574

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I would put some handfull of little nuts or steel marbles with phosphate acid into the tank and shake him like hell to loosen the rust particles.
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Condition inside the gas tank 13 Feb 2019 06:56 #798589

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I would put some handful of little nuts

don't be an idiot like me and throw in some random handfuls from the "misc nut can" and find when you are using a magnet to get them out that some of them were brass :pinch:
'83 GPZ1100, '97 Triumph Trophy 1200, '08 Husky TE610
Verde Valley, AZ
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