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Plastic tank swell and blisters

Blitztour

Just got it firing!
Joined
May 24, 2012
Messages
6
Location
Kent, WA
Whelp, like many here I'm also in hell with the tank of my 2008 Breva 1200 Sport. After two weeks of research and several (ongoing) email correspondences to Paiggio, the results remain…they aint doing a thing about it.

Manufactures who went to the plastic tanks (Harley and Ducati to mention a few) back in the late 90's did not figure on the leaching effect of Ethanol fuel. If you've stored your bike with a little gas in the tank and pulled the cover to find hundreds of hive like blisters under the clear coat, that’s the leaching ethanol gas that did it.
You may have also detected the stench of gas while riding and thought you had a fuel line leak or a weepy injector? Nope, it’s those little gas bubbles emitting that smell. And the same thing that caused the blistering is what deformed your (And my) gas tank. Why? Because these guys didn’t spend an additional $4 and coat each tank with Caswell or Red-Kote or some kind of epoxy sealer which woulda prevented all the leaching, blistering and deformation.


Now, there is precedence for action for all who are interested because in 2012, Ducati owners retained Gibbs Legal Services, filed a class action suit and won! I'm not sure how the settlement unfolded but I’m gonna imagine that there were a bunch of new coated tanks on every Monster that was part of that suit.

As for Piaggio? I spoke with Scott at the USA headquarters and he was very responsive and supportive, but had no real answers. When I asked if the tanks were still available and if they’d either give me or sell me a new Breva tank, he said word came back that I needed to talk to my MG dealer, gave me the part # said and Mandello del Lario factory still had some in stock.

So I looked up the part number, the approx tax and S&H and it came to almost $2k US! And as the Hall & Oats song goes "No can do"

There are some used tanks online in Germany, but every time I write and ask about deformation or leaching, nobody responds. So, I’m reluctant to lat down $4 or $500 to get a tank that may be in as bad or worst shape than mine.

Meanwhile, my friend Jason (Formally or Moto Int, in Seattle) told me that several people thoroughly emptied and washed their tanks and then left them out in the sun to warm up. Its gotta get really hot (like 90’s) and then while the tanks are still hot and pliable, you slap back on the frame manipulate them back into all the correct hole alignments and drop the bolt in. Then ya hit it with the cold water and let in contract and sit there till sundown. If, at that point, it's aligned with the OEM spacing and holes, pull the tank and start sealing it with the Coswell or anything else you like.

Will it work? I don't know but idf it does, I’ll post it here. But if it doesn’t, I’m callin Gibbs and asking them how to go about getting restitution via Class Action.

All I know is I coulda be out enjoying my goose all day on the road…and worked instead. I want my bike repaired by the company who made the mistake. Their negligence is why some of us can’t get the tanks back on our bike and that’s not fair!
 

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The dealer I worked at the time had lots of take offs, warranted many. It don't last forever. Trim the rubber bumpers, slide it on.
14yrs after the fact. At least they have new tanks. Good Luck
 
It is not plastic tanks.

It’s nylon…

It’s also not Ethanol specifically but rather, water pulled into the ethanol due to its hygroscopic properties.

The water migrates through the nylon, rising to the outside surface, which causes the blistering of the paint.

Lastly, the coatings you speak about, don’t always work or do the trick. It’s a crap shoot honestly.

Been talked about many times here in other threads. SEARCH function is helpful.

FWIW: You can get the holes to align with a ratcheting tie down strap wrapped around the tank. Couple of quick clicks and the tank bows and you can insert bolts by hand easy as pie.

I do it to my Centauro, 1200 Sport and Norge tank whenever I have to remove it and replace it.

This is also one of the myriad reasons that I love my California Vintage so much; it has a metal fuel tank, as a proper tank should be made.

It’s the same size every day every time regardless of Ethanol or not.
 
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My Norge is gone (and missed), but I still have the same problem with my Griso.

Happily, I have an "extra" Griso tank.

That said, I have found that removing the tank, rinsing it, and letting it dry -- over winter when possible -- not only "shrinks" it, but removes those annoying "dimples" etc.

I also try to keep premium non-ethanol fuel in it when it sits for more than a few weeks. Hard to find on the road, but you go through those tanks quickly enough. And, here, at least, one local station has premium no-evil fuel.

Bill
 
BION, only H2O.

Yes, I know. No "product," mostly because with my vast experience in "Oh, shix! What did I just do?" sad-face results over the years, I worried about stripping whatever liner or coating was in there ... not that whatever was there has been effective WRT swelling, etc. That's also why I shied from the various coatings out there.

So, water it was.

The faucet at our wellhead has incredible -- think west Texas irrigation ditch :eek: -- pressure, Not talking about pinpoint, pressure-washer stream that could take chrome off a trailer hitch, but a fire-hose flooding torrent in a hard-to-hold-onto-the-tank sort of way.

Obviously, it was the naked tank, i.e., sans fuel pump and other innards and cap, etc., atop.

I held onto as best I could and blasted tanks from both openings.

I then used a leaf blower to get 90% or so of the moisture out, toweled out the rest, and then just let them sit for a few months in the "climate-controlled" (meaning low humidity) side of the Moto Grappa.

Not sure if this is the school solution, but it was enough of a street solution to work for me. "Dimples" disappeared and tanks installed without cursing, banging, or needing a come-along!

FWIW, this has been a WAY more problematic issue with the Norge tank than the Griso's. They seem the same material, but size and shape may play a role. The Griso's tank seems more rigid. But both Norge and Griso tanks got the raised blisters.

I'm down in the Moto Grappa today, getting the EV ready for the road after installing new tires. Yes, I had help. :giggle:

Bill
 
Thank You Very Much! I've never tried to bring a tank back with this method, but it is now another "tool" in my tool-belt.

Much appreciated Counselor!

I do love a good California EV. You and Kathi must be planning a get away if you are prepping the EV! :)🤞
 
The Breva 750s and perhaps other Guzzis in the early-mid 2000s, plus similar period Ducatis, had Nylon fuel tanks. A fine idea to thwart rust in the tanks from condensation, and these tanks worked fine in Europe where ethanol fuel was not (then) in use. For American models, the ethanol negatively affected (and still does) the Nylon fuel tanks. I have the good fortune to have an 04 Breva 750 previously owned by knowledgeable owners who used only non-ethanol fuel and I faithfully continue that tradition. A directory of non-ethanol US and Canada fuel availability is available on-line via Pure Gas' non-ethanol fuel availability website, which lists such gas stations by state/province and city. Non ethanol fuels are available in 87 and 90 octanes, but not usually both at the same station.

I have read, but cannot verify personally, that Nylon tanks that have been deformed by use of ethanol fuels can be return to normal shape by removing all ethanol fuel and replacing this with non-ethanol fuel, but this will take some months. Perhaps others can report on this. I believe that at one time the deformed tanks would be replaced under warranty, but were replaced with new Nylon tanks, and that practice appears to have been discontinued some years ago.

If my Breva had a deformed tank I would use a stout zip tie instead of a bolt at the rear mount.
 
The Breva 750s and perhaps other Guzzis in the early-mid 2000s, plus similar period Ducatis, had Nylon fuel tanks. A fine idea to thwart rust in the tanks from condensation, and these tanks worked fine in Europe where ethanol fuel was not (then) in use. For American models, the ethanol negatively affected (and still does) the Nylon fuel tanks. I have the good fortune to have an 04 Breva 750 previously owned by knowledgeable owners who used only non-ethanol fuel and I faithfully continue that tradition. A directory of non-ethanol US and Canada fuel availability is available on-line via Pure Gas' non-ethanol fuel availability website, which lists such gas stations by state/province and city. Non ethanol fuels are available in 87 and 90 octanes, but not usually both at the same station.

I have read, but cannot verify personally, that Nylon tanks that have been deformed by use of ethanol fuels can be return to normal shape by removing all ethanol fuel and replacing this with non-ethanol fuel, but this will take some months. Perhaps others can report on this. I believe that at one time the deformed tanks would be replaced under warranty, but were replaced with new Nylon tanks, and that practice appears to have been discontinued some years ago.

If my Breva had a deformed tank I would use a stout zip tie instead of a bolt at the rear mount.

Happily for me and others nearby …

92FF97DF AE26 4921 9554 E2755BBEE39E

… this is available at one of the Liberty stations in Winchester at intersection of I-81 & SR 7.

Yes, $pendy, but worth it to me.

Bill
 
I have a 8 year old griso I bought new. The tank swelled in the first year. I got tired of trying to fix the tape stripes and bought a tank from a similar wrecked griso. I lined it with Caswell tank epoxy about 7 years ago and it’s been great every since. I’d do it again. You have to follow instruction….the original tank took about 6 months to go back to its original shape. Hope this helps someone.
 
Here in Ohio, all of the Legacy Farmers Cooperatives usually have ethanol free gas for farmers for their tractors.

I’ve found this same thing in other surrounding states; I just search for a farmers co-op. 👍
 
Bill Hagan: Not really so spendy is the non-ethanol fuel. Most Guzzis are recommended to run on premium gas of at least 91 octane. When I last got non-ethanol 90 octane gas, it was $5.51/gallon. Just about the same as the premium ethanol gas from the same station.

Ralph
 
Here in Ohio, all of the Legacy Farmers Cooperatives usually have ethanol free gas for farmers for their tractors.

I’ve found this same thing in other surrounding states; I just search for a farmers co-op. 👍

Thanks, Scott; did not know that.

My U.S. family has been farming in Maryland, Virginia, and Kentucky since 1662. That said, it annoys me no end to think that taxpayers subsidize the production of ethanol from corn. Now I learn that they also get special opportunities for fueling their tractors. Grrrrrr. :swear:

I also found it ironic when I lived for a couple of years in the Quad Cities that one could get 93 Octane "Recreational Fuel" in the virtual shadow of the distilleries -- erm ... refineries -- that made ethanol from corn.

OK, rant over. If I'm wrong, don't tell me; I'm smugly set and comfortable in my ways. :giggle:

I'm also on a break from putting a new check valve and pressure gauge in my large air compressor that has essentially been an electically operator paperweight and sound generator for 10+ years! Yes, really. :fubar:


i-xKrZ6q4-L.jpg



Anyway, it seems now to work :clap: -- tho I am struggling to replace the covering shroud -- which should make it lots easier to seat the bead on tires. Good timing, too, as the Griso has a flat in its rear Michelin Power. I squared it off on the way back from muttoning in Kentucky last month. I knew I had to R&R it, but hoped to get a few more local miles in. Revzilla says a new Road 4 GT is inbound.


i-6ZTwhnq-L.jpg



Yes, I know. Not about ethanol. I'm a board-certified digression specialist. :rofl:

Bill
 
I’ll gladly take a dose of Bill Hagan any day and twice on vacation days!

Good luck on the compressor repair and Griso tire job!
 
Had the same problem with my Triumph Sprints tank.Take your deformed tanks, empty and dry them out. Let them sit that way for long while (now is a great time for a spare tank) and they will eventually shrink back down. Probably not back original size, but hopefully close enough to go back on with not much fighting.
 
I had the same issue with. Ducati Multistrada 1100s. The fuel tank covered most of the top of that bike. When it swelled it made it a real challenge to remove and reinstall. Gotta shim those valves…
Traded for a Stelvio, no regrets.
 
while checking my fuel filter i decided to pop the bubbles. tank had about 8 or 9 large bubbles. whatever came out is a gas. no liquid. after a couple of days the bubble is gone. smooth, flush with tank. you can see a former light shadow where the bubble was but not very noticeable
 

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I love you guys!! After following this thread, I pulled my Breva tank yesterday. Cleaned and rinsed it with soap and water plus a bag full of drywall screws (Caswell advise). It now hangs in the garage with a computer fan (40cfm)attached to the fuel pump opening and the filler cap removed. It will hang there for a couple of months. I was noticing some slight buckling of the outer surface in places (nothing like the pictures above:(), plus the difficulty getting the aft tank-mount to line up.
Having finished my swing arm bearings, I can wait till early spring to see how it shapes up. I plan on lining it with Caswell epoxy.
 
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