Has anyone successfully de-rusted a bike fuel tank?

Has anyone successfully de-rusted a bike fuel tank?

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Discussion

V1nce Fox

Original Poster:

5,508 posts

74 months

Wednesday 12th July 2023
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Recommissioning a 600 SRAD for a friend and the tank is filthy inside. It’s been stood a good while and after draining it theres a layer of fuzzy surface rust in it.

I’ve skimmed youtube but there’s a million opinions on there.

Has anyone on here got first hand experience of a good technique or product for doing this?

MXRod

2,785 posts

153 months

Wednesday 12th July 2023
quotequote all
I had a generator with a rusty fuel tank , I used a short length of chain like a bare bike chain , any liquid ,soapy water ,jizer etc and gave the tank a good shake ,drain ,rinse ,repeat , a few times , and eventually the tank was fairly free of surface rust inside ,mirror and torch or inspection camera for a look inside

spoodler

2,180 posts

161 months

Wednesday 12th July 2023
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I've successfully used the method outlined in this link on a few vehicles including a forty year old car that was stood for decades. I also used it on a 1980s Morini, sadly, once cleaned out, the tank leaked through a slightly perforated area, so be warned.

https://www.real-classic.co.uk/2015/08/31/petrol_t...

OutInTheShed

8,838 posts

32 months

Wednesday 12th July 2023
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I've cleaned a pretty disgusting tank with hot water and fairy liquid, add gravel and shake it.
I then used a weak solution of phosphoric acid based 'rust remover', no idea if that helped.
An inline filter with a magnet in it still collected more rust than you'd want in a carb jet.

V1nce Fox

Original Poster:

5,508 posts

74 months

Wednesday 12th July 2023
quotequote all
Main advantage i guess is the aperture for the pump to fit through is pretty large so i could easily get a bile chain, gravel, etc in there

How clean does it need to be to run reliably? The pump pick up has a sock on it.

KEITHOA

61 posts

106 months

Wednesday 12th July 2023
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I’ve done a few with electrolysis
Plenty of YouTube videos on how to do it

Janluke

2,657 posts

164 months

Wednesday 12th July 2023
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Approx 3 years ago I used a product called Rosti tank rust remover. Its about £20 and Amazon, it comes in 2 bottles one rust remover , one liner. Straight forward to use and 3 years later its all good

V1nce Fox

Original Poster:

5,508 posts

74 months

Wednesday 12th July 2023
quotequote all
Janluke said:
Approx 3 years ago I used a product called Rosti tank rust remover. Its about £20 and Amazon, it comes in 2 bottles one rust remover , one liner. Straight forward to use and 3 years later its all good
Found one called Rostio? Is that it? If so looks simple.

gareth_r

5,921 posts

243 months

Wednesday 12th July 2023
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I've never tried it (yet!), but Evaporust is another product that seems to get good reviews.

Janluke

2,657 posts

164 months

Wednesday 12th July 2023
quotequote all
V1nce Fox said:
Janluke said:
Approx 3 years ago I used a product called Rosti tank rust remover. Its about £20 and Amazon, it comes in 2 bottles one rust remover , one liner. Straight forward to use and 3 years later its all good
Found one called Rostio? Is that it? If so looks simple.
Yes thats the one, sorry, typing error on my behalf

I watched this guy on Youtube

https://www.youtube.com/watch?v=a-uJy5StGuc

Edited by Janluke on Wednesday 12th July 20:25

mattlacey

89 posts

207 months

Wednesday 12th July 2023
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I had a tank that wasn't crazy gone but did have a lot of surface rust on the inside. Tried a few basics (like vinegar) and got nowhere, fuel kept coming out orange and bike was hating life. Ended up removing the tank (pain in the arse because it was under the seat) and used Rainex Rustbuster on it (https://www.bondall.com/miscellaneous/ranexrustbuster/)

Basically put a load in and gave it a good shake, then let the tank sit in various orientations for 10-15 mins a side. Rinsed it through with the hose, then sprayed a bunch of WD-40 in to help get the water out, let it sit for a while, then finally filled it to the brim with petrol. Never had any rust in there since.

stang65

391 posts

143 months

Wednesday 12th July 2023
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Just in case you don't know....the pump gaskets on this era Suzuki are a weak point. They're legendary on TLRs and I think the GSXR SRAD is similar. When you buy the gasket it will come with new bolts with sealant on them which you need to use. There's a torque sequence for the bolts which need to be barely tight, from memory 3ft/lb so not covered by most torque wrenches. But, even before you get that far make sure that the tank flange is perfectly flat, if the bolts have been overtightened in the past the threads will have pulled so you'll never get a seal. Good luck!

V1nce Fox

Original Poster:

5,508 posts

74 months

Wednesday 12th July 2023
quotequote all
stang65 said:
Just in case you don't know....the pump gaskets on this era Suzuki are a weak point. They're legendary on TLRs and I think the GSXR SRAD is similar. When you buy the gasket it will come with new bolts with sealant on them which you need to use. There's a torque sequence for the bolts which need to be barely tight, from memory 3ft/lb so not covered by most torque wrenches. But, even before you get that far make sure that the tank flange is perfectly flat, if the bolts have been overtightened in the past the threads will have pulled so you'll never get a seal. Good luck!
Good to know, thanks for this.

Thank you to all replies, bike is being built for a very good cause so much appreciated.

Biker9090

1,040 posts

43 months

Wednesday 12th July 2023
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Spirit of salts.

NOTHING comes close.

Read about it in a classic bike mag. Previously tried electrolysis, citric acid, vinegar, molasses, drain cleaner and even filling with bolts and strapping to a cement mixer.

Seriously, it's utterly AMAZING how well and how QUICK it did it. Make sure to rinse out thoroughly dry and either line or coat with oil immediately after.

chrisch77

672 posts

81 months

Wednesday 12th July 2023
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Not a fuel tank, but I’ve used BILT HAMBER DEOX-C very successfully to clean up rusty donor parts for my kit car build. Make up the solution with warm water and I expect it will do a good job, but you’ll probably want to throw some other small metal parts into the tank to provide some abrasion as you agitate the tank.

B'stard Child

29,063 posts

252 months

Wednesday 12th July 2023
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Road Chippings

1/2 litre engine oil

Ratchet Straps

Cement mixer

Might have to orientate the tank a few times to get good coverage but it'll clean the inside out nicely and remove any rust without damaging the tank

CousinDupree

783 posts

73 months

Thursday 13th July 2023
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I've used electrolysis, brick acid etc which do work, but I find it easier to use citric acid / DETOX-C.

Citric acid works great and costs buttons from a food wholesaler or online.

Krikkit

26,919 posts

187 months

Thursday 13th July 2023
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Not a remover but a sealer for after: https://www.aceclassics.co.uk/products/flowliner-t...

Bit expensive as you get loads, but worked a treat for a mate of mine, now running E10 for a couple of years and no sign of peel