Author Topic: What a mess! (Read 5723 times)

sulphurdave · « **on:** September 20, 2014, 05:16:07 PM »

I've always had brand new bikes so I've never had to deal with this and not sure what to do. Whoever had this bike before me decided to pour something red inside the tank and apparently let it seep into the fuel tank petcock. I bought the bike with the carbs off because the previous owner was in the middle of ordering a rebuild kit but sold it to me before all that happened. It looks like he had a bigger mess than just just the carbs now it's my mess. What should I do to clean up the inside of this tank and I would imagine I need a brand new petcock.

Tews19 · « **Reply #1 on:** September 20, 2014, 05:18:56 PM »

What the hell is that? Menstrual cycle! I mean motorcycle tank!

sulphurdave · « **Reply #2 on:** September 20, 2014, 05:25:43 PM »

Lol I was thinking the same thing. Somebody gutted an animal inside that tank

Tews19 · « **Reply #3 on:** September 20, 2014, 05:32:22 PM »

Buy 5 gallons of white vinegar. Soak for a few days. Pressure wash the inside and repeat if you need to .

oldhatt45 · « **Reply #4 on:** September 20, 2014, 05:47:22 PM »

Almost looks like you should put it on a spit and slow roast it over a fire. LOL
Sorry, the Devil made me say it.

All kidding aside, I hope the Vinegar treatment works and I'll be watching this thread to see what happens.

Charlie

sulphurdave · « **Reply #5 on:** September 20, 2014, 05:58:54 PM »

I read somewhere about this Dragon's Blood stuff that seals the inside of tanks. I just googled it could this be what's in there? There's also a couple of areas of epoxy on the underside where there might have had leak or two.

http://www.amazon.com/gp/aw/d/B009T8DPDS?pc_redir=1409932818&robot_redir=1

bjbuchanan · « **Reply #6 on:** September 20, 2014, 06:28:10 PM »

Dragon's blood is caswell tank liner with a red tint to see easier, that is all. Is the red that is in the tank a coating in some spots, gummy in others? Or is it just red gunk in the tank?

Most stabilizers are green in color after sitting in there but I have seen a red one from some dirtbike I fixed for a friend

sulphurdave · « **Reply #7 on:** September 20, 2014, 06:34:56 PM »

Quote from: bjbuchanan on September 20, 2014, 06:28:10 PM

Dragon's blood is caswell tank liner with a red tint to see easier, that is all. Is the red that is in the tank a coating in some spots, gummy in others? Or is it just red gunk in the tank?

Most stabilizers are green in color after sitting in there but I have seen a red one from some dirtbike I fixed for a friend

How you see the pics in my original post is what it looks like in there. That's about all I can see taking pics with my phone. Doesn't look like it's completely coated. Mostly on the hump and lower creases on each side. It feels hard to me on the hump. I can't reach the bottom creases which looks to be gummy but idk. The red stuff in the petcock was gummy.

bjbuchanan · « **Reply #8 on:** September 20, 2014, 06:38:00 PM »

Is it coated on the top, underside of the tank?

If it was dragon's blood I doubt it would fail. Caswell is some good stuff, not like others. As for removing it, I'm not sure. Could try MEK in there but you really gotta do it right and plug it up well

calj737 · « **Reply #9 on:** September 20, 2014, 06:59:18 PM »

Hang tight! That liner could easily be RedKote. There's no reason to remove it from the tank, as doing so could reveal other problems.

For the petcock, drop it in a glass jar filled with acetone. The acetone will dissolve the gunk built up in the petcock (very likely). The vinegar will remove rust, may not remove the liner. The MEK or Acetone will.

sulphurdave · « **Reply #10 on:** September 20, 2014, 07:11:35 PM »

Quote from: calj737 on September 20, 2014, 06:59:18 PM

Hang tight! That liner could easily be RedKote. There's no reason to remove it from the tank, as doing so could reveal other problems.

For the petcock, drop it in a glass jar filled with acetone. The acetone will dissolve the gunk built up in the petcock (very likely). The vinegar will remove rust, may not remove the liner. The MEK or Acetone will.

Would it be worth it to just buy a new petcock with new gaskets? This one the screws are almost stripped and gaskets are trash not to mention gunked up with the red goop in and around the inlet tube.

sulphurdave · « **Reply #11 on:** September 20, 2014, 07:18:55 PM »

Found this google image under Red-Kote and it looks similar to what I see inside my tank.

calj737 · « **Reply #12 on:** September 20, 2014, 07:21:39 PM »

I'd at least try to clean it and remove the screws with small vise grips. Gaskets and screws are easily replaced. If your petcock is widely available, toss it and replace if that's easier for you....

Back to your tank.... To confirm the liner is in proper condition, fill with some gas and confirm it doesn't leak nor catch any of the liner flaking off. With petcock off but cap on, invert and fill fro below. Let sit overnight. Drain. If any of the liner is loose, fill with Acetone or MEK and soak the liner out. Then re-test for leaks.

sulphurdave · « **Reply #13 on:** September 21, 2014, 10:31:26 AM »

I honestly think the inside of the tank needs to be redone. I'm willing to redo the Red-Kote too but I'm just feeling all kinds of flaking off action under the top side of the tank and don't feel confident at all about it. So which chemical would work best to get it out?

750cafe · « **Reply #14 on:** September 21, 2014, 10:49:27 AM »

I would save some time, money and trouble and just look for a MUCH better used tank.

Eric

Stev-o · « **Reply #15 on:** September 21, 2014, 11:14:46 AM »

MEK should remove all that crap. And I'd buy a new petcock.

PeWe · « **Reply #16 on:** September 21, 2014, 11:20:05 AM »

Buy a new tank! It does not look like a CB750 that yamiya750 sell.
It must be alternatives on eBay for all kind of old CB's.

sulphurdave · « **Reply #17 on:** September 21, 2014, 11:36:04 AM »

I was trying to restore the bike as close to stock as possible with stock jets and air box, get it running (still don't know if it runs) ride it around as is for a little while and take some pics and videos of it like that before I start to mod it. This tank mess is making me want to skip all that and start modding now. Probably a different tank, bigger jets, velocity stacks or pods, 4 into 1 exhaust... y'all know how it goes, all the typical mods.

calj737 · « **Reply #18 on:** September 21, 2014, 12:55:07 PM »

If it's a metal tank, Aceotone or MEK work best. But I'm not sure if use either of those with a fiberglass tank.

sulphurdave · « **Reply #19 on:** September 21, 2014, 03:07:18 PM »

To remove the red stuff or to remove rust? Or both?

calj737 · « **Reply #20 on:** September 21, 2014, 03:09:19 PM »

To remove liner. Once done, then deal with rust using vinegar, EvapoRust, The Works toilet cleaner, etc.

Is the tank metal? You mentioned Benjie a few days ago, is it one of his tanks?

sulphurdave · « **Reply #21 on:** September 21, 2014, 03:13:42 PM »

It's a stock metal tank. I didn't mention that person I don't believe. I don't know who that is.

calj737 · « **Reply #22 on:** September 21, 2014, 03:58:00 PM »

Sorry, confused on the threads.

Definitely acetone or MEK. Then de-rust. Check for leaks. May not need a liner if rust is eliminated and no holes present.

Stev-o · « **Reply #23 on:** September 21, 2014, 04:32:21 PM »

Quote from: sulphurdave on September 21, 2014, 03:13:42 PM

It's a stock metal tank. I didn't mention that person I don't believe. I don't know who that is.

Good question. Who is Benji?!

calj737 · « **Reply #24 on:** September 21, 2014, 04:44:59 PM »

Another thread with a similar issue had bought their tank from Benjie of Benjies Cafe Racers. Just had it in my head... Mea culpa

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Author Topic: What a mess! (Read 5723 times)