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Rusty Tank 1978 KZ750 Twin 03 Jan 2023 08:26 #878481

  • Mikaw
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I’d like to add one other trick to the above great methods. Go to your local hardware and get a couple one pound boxes of truss head metal stud framing screws. See stock photo pulled from the internet. Add them to a half full tank, make sure it’s sealed off and shake, shake, shake till your arms want to fall of then shake some more. Pour out And strain out the screws. It helps break up any solidified solids, and breaks the rust loose.

Site wouldn’t let me add the attachment.

Bill fixed the attachment issue. Thanks bill.

 
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.
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Rusty Tank 1978 KZ750 Twin 03 Jan 2023 13:59 #878494

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I’d like to add one other trick to the above great methods. Go to your local hardware and get a couple one pound boxes of truss head metal stud framing screws. See stock photo pulled from the internet. Add them to a half full tank, make sure it’s sealed off and shake, shake, shake till your arms want to fall of then shake some more. Pour out And strain out the screws. It helps break up any solidified solids, and breaks the rust loose.


 

hahahaha "shake until your arms fall off" will do. one of my friends told me to go to home depot and get some skinny chain, throw that in and shake it.

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Rusty Tank 1978 KZ750 Twin 03 Jan 2023 15:59 #878496

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I used vinegar & a small 3' chain, it worked good. 
I read where someone wrapped the tank in an old sleeping bag & put it in the dryer, sounds funny but I think I might try it next time, it's hard work shaking that vinegar filled tank !
1979 KZ1000 LTD
1978 CB750F
2012 FLHTK

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Rusty Tank 1978 KZ750 Twin 04 Jan 2023 06:52 #878512

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i use petrol or greesareein

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Rusty Tank 1978 KZ750 Twin 04 Jan 2023 08:35 #878516

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Just make sure the dryer doesn't go BOOM !!! ha ha.

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Rusty Tank 1978 KZ750 Twin 04 Jan 2023 08:53 #878518

  • Kelly E
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With EvapoRust you just fill up the tank and wait a day or two, then do the diesel rinse. No shaking till your arms fall off, nuts and bolts or possibly causing damage tumbling in the dryer.
This reminds me of the debates over on V4 Muscle Bike about what to use in your ultrasonic tank. Everyone is always trying weird stuff instead of using the proper solution. I've seen stained and ruined carbs from some of the attempts at carb cleaning. We've cleaned over a dozen gas tanks with EvapoRust with excellent results and the EvapoRust is still good to use on more rusty hardware and parts.
The Rust Bros. Garage Collection
1974 Honda CB 550 K0
1975 Honda CB 400F Super Sport
1977 Kawasaki KZ 1000 LTD
1980 Suzuki GS 1100E
1981 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda Sabre 700
1984 Honda Interceptor 1000
1994 Kawasaki ZG 1000 Concours
And more
The following user(s) said Thank You: Wookie58

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Rusty Tank 1978 KZ750 Twin 04 Jan 2023 11:18 #878526

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Evaporust is fantastic stuff.  It's not cheap, though, and it loses effectiveness with use, so it has a limited lifespan.  I went to phosphoric acid because it's cheaper, and it can be used again and again.  

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Rusty Tank 1978 KZ750 Twin 04 Jan 2023 13:54 #878530

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Heat helps with whatever you use.
The first tank I de-rusted was in the summer, I left it out in the sun, filled with vinager, on a 95 degree day. After 1 day the tank looked great.
Another time I used vinager was durring the winter. I left the tank in a 40 degree garage for over 2 days, and very little rust was removed.
I may use an aquarium heater the next time I need to de-rust a tank in the winter.
79 KZ400
82 KZ305
85 VF1100c
85 VT 500c

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Rusty Tank 1978 KZ750 Twin 23 Jan 2023 22:05 #879216

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I priced out EvapoRust would have cost over $200 (CAN) to fill the the tank.
1979 KZ1000 LTD
1978 CB750F
2012 FLHTK

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Rusty Tank 1978 KZ750 Twin 24 Jan 2023 13:00 #879234

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I saw a guy in a recent Youtube video tape a rusty gas tank with screws in it to the rear wheel of a jacked up 4-wheeler.  
Put it in gear and let it spin for an hour or so.


 
1978 KZ 1000B (73 tribute)
1977 KZ1000 project
1976 KZ 900
1976 KV 75
1976 Honda Elsinore MT250
1974 Z1 900 project
1971 Honda CT70

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Rusty Tank 1978 KZ750 Twin 02 Feb 2023 09:51 #879656

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Like some, I have noticed some interior tank rust developing.  Appears to be surface rust at the bottom of the gas tank. Not flaky rust.  The rust is seen at the seams, left and right.  The tank had been coated with Kreem ( a white – tan color inside)  by the PO and not a great job obviously.  Ie,  No flow or coverage to the seams.This spring, I am considering a vinegar wash with screws to remove the surface rust at the seams. I do Not plan to strip the Kreme coating off.  It seems to be okay and not flaking or any residue.Anybody had a similar experience with good results to achieve some effective preventative maintenance to save the tank from further rust but not remove the tank liner with a complete chemical strip method?    Or any insight or your perspective is welcome too.

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Rusty Tank 1978 KZ750 Twin 02 Feb 2023 14:07 #879671

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Need some experienced kaw restoration help please.  Got a rusty kz tank question.  
Like some, I have noticed some interior tank rust developing.  Appears to be surface rust at the bottom of the gas tank. Not flaky rust.  The rust is seen at the seams, left and right.  The tank had been coated with Kreem ( a white – tan color inside)  by the PO and not a great job obviously.  Ie,  No flow or coverage to the seams.This spring, I am considering a vinegar wash with screws to remove the surface rust at the seams. I do Not plan to strip the Kreme coating off.  It seems to be okay and not flaking or any residue.Anybody had a similar experience with good results to achieve some effective preventative maintenance to save the tank from further rust but not remove the tank liner with a complete chemical strip method?    

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