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1980 CX500 Custom
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Discussion Starter · #1 ·
I'm cleaning out my tank with apple cider vinegar and rocks and I have a layer of something coming off from inside the tank. I'm assuming some sort of liner. My plan was to get all the rust out and then use red Kate to cote the inside but now I'm worried that this tank is useless. Any ideas?
 

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Try soaking a piece in acetone to see if it disolves. If it does you should be able to soak it out of the tanks. Some liners will, some won't.

Failed liners are bastards and I've heard many horror stories ..... often involving redkote.....

I'd be considering Por15.....
 

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It's the best. I have two tanks lined with it. The first about 13 years ago. It's still good.

The other about two years ago - using the rest of the first can from 11 years before.

This is my limited personal experience but I've researched liners pretty well.

Others can and will add their 2 cents.

Most complaints of failed liners I've see have been ...... {drum roll} .... in first place - kreem. Runner up - redkote.
 

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'84 CX650E that is evolving into a GL500
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I'm interested in how you expect to get the rocks back out of the tank when you are done.

FWIW, I've heard that using a length of chain works as well as anything else but is much easier to remove.
 

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1978 CX500 "The Grub", 1983 GL650I "Nimbus"
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Steel BBs or nuts can be removed with a magnet, along with loose rust flakes.
 

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1980 CX500 Custom
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Discussion Starter · #7 ·
I figured if I shake the tank enough and rinse enough they'll come out. I was just going off what I've read. Hopefully it won't be too bad.
 

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CX650 motor project into a CX500 Turbo Frame - ongoing
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I'm interested in how you expect to get the rocks back out of the tank when you are done.

That made me smile too much.


@ChrisDiehl Lowes carries muriatic acid in the cleaning aisle. Worked far better than vinegar if you end up with actual rust to remove, and maybe rocks too :)
 

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I figured if I shake the tank enough and rinse enough they'll come out. I was just going off what I've read. Hopefully it won't be too bad.
Shop Vac?
 
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81 Gl500i 83 CX650E
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Second the shopvac , hopefully he used small rocks! To clean tanks I take a spray paint can lid drill a hole for a piece of 3/4 inch tubing and stick it on the hose of the shopvac. I have used Por 15 on three tanks one is 11 years old , two points make sure tank is drier than dry, before putting in the coating and it dont stick to other coatings. Por 15 does make an excellent stripper , and the only one that will take Por15 off, cheers
 

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The shopvac doesn’t have to actually vacuum the rocks, just grip them for removal, as a smallish vac tube will be needed.
 
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81 Gl500i 83 CX650E
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Or A mechanics grabit tool will work.
 

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1978 CX500 "The Grub", 1983 GL650I "Nimbus"
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1978 Honda CX-500.. a work in progress
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I too have seen disasters with tank coatings in the almost 40 years in the bike biz. Most...are due to poor prep work, or scrimping on the application times, etc. After fooling with 2 and 3 part coatings I decided to try single step RedKote after it was highly recommended. It has performed flawlessly in the TW-200 tank I ride weekly for about 12 years. YRMV. My only use of it so far, but I only used 1/4 of the can so passed it on down the line to other users. Have not heard any bad results from them. I will say it took 2 to 3 times longer to cure than the estimated time on label, but heat and humidity vary so much.
 
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