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post #11 of 35 (permalink) Old 09-15-2010, 10:32 PM
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Now that you mention it the color of the inner stuff doesn't look like it did when I painted my tank. I wish I had taken pics of it but I recall it being more white colored.

If I were you I would sand down the area and see how bad it really is. Paint can and does hide quite a bit.

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post #12 of 35 (permalink) Old 09-15-2010, 11:21 PM Thread Starter
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I'll try to look on the inside of the tank over the weekend. If I can't get that far down with a light and dental mirror, a friend has one of those scope things with a little camera & video screen that ought to work. I don't think the previous owners did any damage to the tank, but I would like to make sure before talking to Triumph. I had the bike roll off the sidestand one time onto the left side, and the front side panel took the hit. The tank was untouched. Where the tank is failing is curved pretty far inward towards the seat.

In researching this, I did find some mentions that Triumph used the same Acerbis PA6 nylon (which absorbs water) tanks as did Ducati, and from the very interesting info here, Ducati has replaced some of them. The ethanol absorbs ambient moisture, and if it sits for a period of time the heavier water/ethanol mixture settles to the bottom, where the PA6 absorbs the water. I'm guessing that if my tank is indeed "double lined", it's just the expansion of the inner tank causing the ruptures in the outer bodywork.

The attorney who runs the email list of Ducati owners (see above link) who've had defective tanks has stated this problem is definitely worse in the humid areas of the US (east & south), and that his mailing list doesn't show many instances of it in drier climates.

If my tank is made of this PA6 and there's no bondo on it, I'll try a defective product goodwill claim with Triumph before doing anything else. My service manual clearly states that E10 fuel is allowed, so the tank on the bike should've been able to handle it.

...Mama loves short track, short track, short track, but what she really loves is THE MILE.
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post #13 of 35 (permalink) Old 09-16-2010, 10:41 AM
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My local Duc dealer has coordinated warranty replacement for plastic tank problems for several of my friends. It seems to be a straight forward process with no hassles. The only hiccup is that Ducati is issuing plastic replacement tanks until the supply is exhausted, and will switch to metal after that.

And the info re the tank being Acerbis is correct. I examined one of the defective Ducati tanks and saw the manufacturer name and plastic symbol. It is the same as under my 06 Triumph tank.

Let the hysteria begin.

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post #14 of 35 (permalink) Old 09-16-2010, 11:36 AM
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So is it safe to ass(ume)!! that the 955i generation were also made by Acerbis....with the same properties??

( I have noticed my tank expand/contract.....even with the drain holes free and clear)......

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post #15 of 35 (permalink) Old 09-16-2010, 11:41 AM Thread Starter
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My local Duc dealer has coordinated warranty replacement for plastic tank problems for several of my friends. It seems to be a straight forward process with no hassles. The only hiccup is that Ducati is issuing plastic replacement tanks until the supply is exhausted, and will switch to metal after that.

And the info re the tank being Acerbis is correct. I examined one of the defective Ducati tanks and saw the manufacturer name and plastic symbol. It is the same as under my 06 Triumph tank.

Let the hysteria begin.
Hi OnD, long time no chat!

Whether I end up with a used or new tank I plan to coat the inside with something like this.

...Mama loves short track, short track, short track, but what she really loves is THE MILE.
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post #16 of 35 (permalink) Old 09-16-2010, 11:46 AM
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Laura, (this from Mr. Obvious) if you pull the tank and take off the fuel pump mounting plate, you'll have easy access to the inner surface.

And, I doubt you'll be able to apply anything to the plastic surface with much success.
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post #17 of 35 (permalink) Old 09-16-2010, 12:17 PM Thread Starter
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Laura, (this from Mr. Obvious) if you pull the tank and take off the fuel pump mounting plate, you'll have easy access to the inner surface.

And, I doubt you'll be able to apply anything to the plastic surface with much success.
I'll try that.

The Caswell's coating will evidently stick to PA6. The tank should be very, very dry. I've run across reports of year-old successful applications on Ducatis.

Now I'm seeing reports of this on an Aprilia forum.

From what I can tell, the symbol for PA6 should be the standard plastic recycling symbol of three arrows in a triangle, with either "PA" inside the triangle, or "PA6" next to the triangle. It is not a "6" inside the triangle; that's a totally different material. I had to to use deep google-fu to find this much, so someone might check behind me.

...Mama loves short track, short track, short track, but what she really loves is THE MILE.
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post #18 of 35 (permalink) Old 09-16-2010, 12:28 PM Thread Starter
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And, it seems that the PA6 material is what makes the plastic tanks paintable and it was a big deal for that reason when it was created. I can't paint the tank of my DR or even put stickers on it unless they have holes all through them because of the gas fumes coming through.

I've read a couple of places now that when Acerbis cornered a huge market share for paintable plastic tanks, they didn't realize the impact that the hydrophilic properties of ethanol combined with humid climates would have on their tanks since they don't use ethanol in Europe. We have some Europeans on this board, don't we? Are you guys still ethanol-free over there?

...Mama loves short track, short track, short track, but what she really loves is THE MILE.
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post #19 of 35 (permalink) Old 09-16-2010, 02:53 PM
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Originally Posted by Laura0107 View Post
Hi OnD, long time no chat!

Whether I end up with a used or new tank I plan to coat the inside with something like this.
Hey, Laura. I've been keeping up with your bit of bad luck with the tank.

For years, POR15 was the preferred tank coating but the Caswell compound is now the most recommended. It is what I would use.

What's this about a broken foot? Been kicking people, and then blaming it on a bike mishap?

BTW, good research re the plastic symbol. I can see you had to wade through a lot to reach an answer.

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post #20 of 35 (permalink) Old 09-16-2010, 03:42 PM Thread Starter
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Hey, Laura. I've been keeping up with your bit of bad luck with the tank.

For years, POR15 was the preferred tank coating but the Caswell compound is now the most recommended. It is what I would use.

What's this about a broken foot? Been kicking people, and then blaming it on a bike mishap?

BTW, good research re the plastic symbol. I can see you had to wade through a lot to reach an answer.
I was carefully picking my way up a fairly steep, rocky slope in the North GA mountains with the DR, and near the top my rear started spinning. I slid backwards, arced 90 degrees to where I was perpendicular to the "road", then wham/body slam. I don't remember having to get out from under the bike afterwards, so I think my left foot was just momentarily crushed between the bike and the rocky ground. I've had to gracefully bail off the DR before in the flatlands, but this one happened very quickly. So I learned the hard way that some momentum and nice steady throttle in such conditions are my friends, and had to use that lesson immediately after the crash to make it back to civilization. Broke the base of the third metatarsal, possibly broke the cuboid/calcaneal joint (that one didn't show up on a regular x-ray but the doc never did an MRI), sprained ankle, soft tissue damage, deep bone bruise on my fibula, etc. I sold the boots I had on and now have some full-on MX boots for such rides.

I had been off crutches for a week when the nightly low temperature dipped to about 60*F two days ago, our first little fall cold snap. Walking out of the house to go to work, I looked at the Sprint and just couldn't stand it any more. Had to ride it. Right then. Then I discovered the crack, and now my ankle has let me know that it was not ready for shifting gears quite yet, so I'm back on one crutch. Aaarrgh. Gotta be tough if you're gonna be stupid, I guess.

...Mama loves short track, short track, short track, but what she really loves is THE MILE.
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