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Old 06-12-2012, 01:04 AM   #1
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Bikes with plastic tanks.....

If you have a bike with a plastic tank, have you experienced any tank deformation?

My SDR tank swells, to the point that it will not bolt on easily, and when it is bolted the tank rubs the steering head.

I know on the SDR forums, its a "common" problem, but KTM is iffy on replacing the tanks on bikes out of warranty, and most say its up to the dealer.

I also know Ducati settled a class action lawsuit concerning tank deformation.

Anyone else?

Anyone here work at a KTM dealer?
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Old 06-12-2012, 05:13 AM   #2
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apes have been known to have that prob. ape doesn't seem to bad about warranty though,.
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Old 06-12-2012, 06:50 AM   #3
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Old 06-12-2012, 07:07 AM   #4
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'02 Aprilia RSVR with an Acerbis tank (stock). The tank has swelled so bad that I'm fairly certain I've cross-threaded the bolts trying to get it back on.
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Old 06-12-2012, 07:21 AM   #5
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The majority of Duc tanks that aren't metal fit like and have big wear points where to show.
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Old 06-12-2012, 07:49 AM   #6
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I had no clue this was a prob...Ill find out when i pull my tank to install a DNA stg II air filter on my Ape
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Old 06-12-2012, 07:59 AM   #7
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The problem is caused by the moisture sucked up in ethanol'ed fuels.
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Old 06-12-2012, 08:00 AM   #8
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Quote:
Originally Posted by HMFIC View Post
If you have a bike with a plastic tank, have you experienced any tank deformation?

I also know Ducati settled a class action lawsuit concerning tank deformation
Had the tank on the Streetfighter replaced for swelling, under warranty... for now.

Don't know what'll happen in the future. Good luck and thanks to the folks that decided ethanol was a good thing.
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Old 06-12-2012, 08:02 AM   #9
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Quote:
Originally Posted by po-po 5.0 View Post
The problem is caused by the moisture sucked up in ethanol'ed fuels.
Yep. Huge problem on all the Duc Monsters.
Ducati North America after the suit, at least settled with replacing one tank per customer for free.

There is an fuel additive that Ducati techs recommend adding as often as possible to prevent this. I don't remember the name, I think K(F?)-101 or something like that.
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Old 06-12-2012, 08:05 AM   #10
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Quote:
Originally Posted by HMFIC View Post
If you have a bike with a plastic tank, have you experienced any tank deformation?

My SDR tank swells, to the point that it will not bolt on easily, and when it is bolted the tank rubs the steering head.

I know on the SDR forums, its a "common" problem, but KTM is iffy on replacing the tanks on bikes out of warranty, and most say its up to the dealer.

I also know Ducati settled a class action lawsuit concerning tank deformation.

Anyone else?

Anyone here work at a KTM dealer?
My SuperDuke does it too. Does not rub the steering head, but the bolt is a bear to get back in. The worst I have seen is the Harley XR1200. The actual tank is plastic, and the outer shell is a snap on cover. Swells so bad the cover raises up a 3/4 of an inch, or more, and will not stay snapped in place.

Even if you get KTM to replace the tank, it will just do it again. Have heard that Ducati suggests lining the tank, with some kind of sealer, to prevent it from happening again. I have used a product from Caswell, in the past, to restore vintage fiberglass tanks. Lots of debate in the restoration arena over the best product to use, and the Caswell sealer seems to be the winner.
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Old 06-12-2012, 08:09 AM   #11
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Quote:
Originally Posted by Senator View Post
There is an fuel additive that Ducati techs recommend adding as often as possible to prevent this. I don't remember the name, I think K(F?)-101 or something like that.
Was it Starbright StarTron? Heard some mumbling that this stuff comes highly recommended. I see that Stay-Bil now makes an ethanol treatment, as well. Not sure it is any better, but at least I have heard of Stay-Bil products.

Anyone have experience, with either of these two? Or, others?
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Old 06-12-2012, 08:20 AM   #12
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Quote:
Originally Posted by DGShannon View Post
Was it Starbright StarTron? Heard some mumbling that this stuff comes highly recommended. I see that Stay-Bil now makes an ethanol treatment, as well. Not sure it is any better, but at least I have heard of Stay-Bil products.

Anyone have experience, with either of these two? Or, others?
Not entirely sure. I got it confused with POR-15, the sealant. However, this is an ethanol treatment like you describe. I will find out for sure, they are supposed to be giving me a bottle with the bike.
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Old 06-12-2012, 08:34 AM   #13
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Quote:
Originally Posted by Senator View Post
I will find out for sure, they are supposed to be giving me a bottle with the bike.
Cool. Anxious to know what they give you. Assume with all the lawsuits, and liability, that a lot of research has been done somewhere, as to what products work, and what does not. Like to get on the inside track, and not play guinea pig for some dookie product.
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Old 06-12-2012, 08:43 AM   #14
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Cool. Anxious to know what they give you. Assume with all the lawsuits, and liability, that a lot of research has been done somewhere, as to what products work, and what does not. Like to get on the inside track, and not play guinea pig for some dookie product.
The product is K100 Fuel Treatment, supposedly as good and most of the time better than the Startron.
Link to website:
http://www.k100fueltreatment.com/stabilizer.html

Quote:
There is huge thread over at the ducatimonsterforum.org about this stuff, but here is the TLDR version...

The only fuel additive that has been independently 3rd party tested to encapsulate water and not let it settle is K100. This testing was done by a end user sending it to a lab. The other labels didnt respond to any requests for independent verification and are generally just made of alcohol or naphtha.

Sta-bil/Startron/Seafoam etc will have no affect on the water in your system, but will help make starts easier after long term storage and prevent laquering inside the engine.
Huge Thread on Ducati Tank Expansion
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Old 06-12-2012, 10:04 AM   #15
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I found a thread somewhere on advrider where a guy coated the inside of his tank with epoxy to deal with this...seemed like a decent and easy solution

here

http://advrider.com/forums/showthread.php?t=616792
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Old 06-12-2012, 10:21 AM   #16
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Quote:
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I had no clue this was a prob...Ill find out when i pull my tank to install a DNA stg II air filter on my Ape
Dude I removed/reinstalled my tank covers yesterday.... they swell badly! The rear fastener on the left side is broken now. I had to do the old put one screw in the front and try to stretch the plastic to get the rear on. Good luck, maybe try doing it at night instead of the middle of the day like I did.
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Old 06-12-2012, 10:30 AM   #17
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Quote:
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Dude I removed/reinstalled my tank covers yesterday.... they swell badly! The rear fastener on the left side is broken now. I had to do the old put one screw in the front and try to stretch the plastic to get the rear on. Good luck, maybe try doing it at night instead of the middle of the day like I did.
how often do you ride? mileage?
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Old 06-12-2012, 10:35 AM   #18
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Spoke with Dan at WW Honda service and he is going to research the issue. Wait and see.....
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Old 06-12-2012, 10:38 AM   #19
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frank, how often do you ride? alot of miles

a theory of mine is that alot of it comes from sitting around vs running thru tanks of gas...
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Old 06-12-2012, 10:43 AM   #20
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frank, how often do you ride? alot of miles

a theory of mine is that alot of it comes from sitting around vs running thru tanks of gas...
Its sat for the better part of the last yr....only 5k miles, fuel is treated with Sta-Bil Marine....

No swelling probs prior...ridden at least monthly
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