marlboro man Posted October 14, 2012 Report Share Posted October 14, 2012 just got a real clean 1976 kz900 & the gas tank has some rust using evapo-rust right now put a gal in it but I have to move it around but it is taking a long Quote Link to comment Share on other sites More sharing options...
ReconRat Posted October 14, 2012 Report Share Posted October 14, 2012 Add BBs, or scouring pads (no soap)? It take a lot of time...I've heard of people using old steel nuts and bolts also. At least those will come back out with a magnet on a stick. Quote Link to comment Share on other sites More sharing options...
tash566 Posted October 14, 2012 Report Share Posted October 14, 2012 i agree with recon, i would use the bb's (well i would have ball bearings left over from work) then use a tank sealer like Kreem. Quote Link to comment Share on other sites More sharing options...
max power Posted October 15, 2012 Report Share Posted October 15, 2012 I demand pics of this badass classic. Quote Link to comment Share on other sites More sharing options...
BDBGoalie Posted October 15, 2012 Report Share Posted October 15, 2012 Spray it with a hose and let it sit outside for a week. Quote Link to comment Share on other sites More sharing options...
BDBGoalie Posted October 15, 2012 Report Share Posted October 15, 2012 But really rust in a tank sucks. The best way is a strong solvent with media to knock stuff loose. Let it sit for a while and it will loosen up. Quote Link to comment Share on other sites More sharing options...
jester3681 Posted October 15, 2012 Report Share Posted October 15, 2012 Do some online searching - there are systems designed just for this. Not cheap ($100+) but they do the job. Pretty sure POR15 makes one, maybe Eastman too. Quote Link to comment Share on other sites More sharing options...
imprez55 Posted October 15, 2012 Report Share Posted October 15, 2012 BB's as mentioned, nuts and bolts, chain lints etc. will work to help remove it. If it is just a light surface rust in a small section then you can just try to remove it as suggested, but if you are going to try and seal the whole gas tank then get a chemical that will cause a reaction to the rust to bind to the top sealing layer. I have heard many stories about POR15 not working correctly. I do not know the reason (I have never used it myself) but I suspect it is due to improper surface prep. Quote Link to comment Share on other sites More sharing options...
marlboro man Posted October 16, 2012 Author Report Share Posted October 16, 2012 I demand pics of this badass classic. will post when done with cleaning but it is going to clean up to show room new dont know how it stayed that nice for 36yrs its in better shape then my 2006 Quote Link to comment Share on other sites More sharing options...
max power Posted October 16, 2012 Report Share Posted October 16, 2012 Nice. Why no mention of this at the shack? Quote Link to comment Share on other sites More sharing options...
cOoTeR Posted October 16, 2012 Report Share Posted October 16, 2012 http://www.amazon.com/gp/aw/d/B001J0DHZK Quote Link to comment Share on other sites More sharing options...
marlboro man Posted November 2, 2012 Author Report Share Posted November 2, 2012 hear is what my tank looks like Quote Link to comment Share on other sites More sharing options...
Bubba Posted November 2, 2012 Report Share Posted November 2, 2012 Couple of rolls of pennies. Copper (or whatever the hell they're clad with nowadays) is softer than the steel and easier on the tank. A dilute acid should also remove rust--phosphoric for sure, or the commercial product "Lime-Away"--but MAKE SURE YOU RINSE EVERYTHING real well when you're done. Use some baking soda to neutralize the residue after the initial rinse.I wouldn't use any of the liner products like POR unless you've got a leak. Quote Link to comment Share on other sites More sharing options...
Carwhore Posted November 2, 2012 Report Share Posted November 2, 2012 I used rocks distiller vinager and salt. Worked great. Quote Link to comment Share on other sites More sharing options...
Gixxus Christ! Posted November 2, 2012 Report Share Posted November 2, 2012 Bicycle chain. Ever tried to get that last nut/bolt/bb/rock out? Bike chain is the way to go, then phosphoric acid, it will put a skin-coat of ferric phosphate on the steel protecting it from rust. Or......You can mix up some electrolyte (water plus washing soda) fill the tank, suspend a cast iron doohickey in the tank NOT TOUCHING ANY PART OF IT and hook a battery charger to it. Neg lead on the tank, pos on the iron. The electricity passes from the tank to the electrolyte, picks up the rust and sticks it to the iron. Use iron or mild steel, no stainless. Graphite works the best but I doubt you have a big chunk of that handy. Clean your annode daily and change the fluid every two days6-10 amps is good current. . Produces hydrogen gas in small quantities so put a fan on it. Quote Link to comment Share on other sites More sharing options...
ReconRat Posted November 2, 2012 Report Share Posted November 2, 2012 (edited) Bicycle chain is a great idea. And I also use the phosphoric acid. Electrolysis is also excellent if set up properly.edit: Swimming pool muriatic acid should work pretty well also.edit: http://www.instructables.com/id/Electrolysis-rust-removal-motorbike-fuel-tank/Edit: Found this, not tried it before.Metal Rescue for restorationhttp://www.amazon.com/Workshop-Hero-WH290487-Rescue-Remover/dp/B005JVNQPQhttp://www.metalrescue.com/consumer.aspx Edited November 2, 2012 by ReconRat Quote Link to comment Share on other sites More sharing options...
ohiomike Posted November 2, 2012 Report Share Posted November 2, 2012 http://gastankrenu.com/ Quote Link to comment Share on other sites More sharing options...
Jcarlson Posted November 4, 2012 Report Share Posted November 4, 2012 I've used straight vinegar in the past. Fill that sucker up to the brim, let sit 2-3 days then dump it out. The down side is you have to rinse it when you're done to neutralize the acid. You can use just water but it'll get a super fine surface rust when you're done (defeats the purpose, right?) but it's not too bad.Then I use REDKOTE to seal it. I don't like Kreem because that dries kinda like a porcelain, or like an egg shell hardness and if you don't get that just right it cracks off and clogs the fuel line.REDKOTE is available at Orielly Auto Parts for about $26. It's intended for cars so you'll get enough to do about a 17 gallon tank. It's more of an elastisized sealant so there is no cracking like Kreem.Just remove the petcock and any fuel gauge you may have, dump it in, swirl it all around good, then set it upside down on a bucket to let it drain. It's a little stinky so don't do it indoors. Once the stink is gone in a day or two it's fully cured.http://www.oreillyauto.com/site/c/search.oap?keyword=redkote Quote Link to comment Share on other sites More sharing options...
gixxie750 Posted November 4, 2012 Report Share Posted November 4, 2012 Fill it 1/4 way full of nuts and bolts. Get a bed comforter and wrap the tank and tape it safely in. Put wrapped tank into clothes drier and turn on low heat and leave it in for as many cycles as necessary. norm 2 runs @ 1hr. Now shake all rust and nuts and bolts out and seal the tank. AMAZING results out of the clothes drier! Quote Link to comment Share on other sites More sharing options...
Jcarlson Posted November 4, 2012 Report Share Posted November 4, 2012 I considered the clothes drier thing too but my wife would shit if I did something like that. Plus all that banging around. I'd be sleeping in the gargae with the bike for sure!! LOL Quote Link to comment Share on other sites More sharing options...
marlboro man Posted November 28, 2012 Author Report Share Posted November 28, 2012 ]hear are some photos of bike cleaned up[/ATTACH] now all I need is to find a stock seat & sinc the carbs Quote Link to comment Share on other sites More sharing options...
max power Posted November 29, 2012 Report Share Posted November 29, 2012 Now start a for sale thread with pictures that you upload to photobucket. Looks good. Quote Link to comment Share on other sites More sharing options...
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