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Petrol proof paint for a plastic fuel tank.

9.1K views 43 replies 12 participants last post by  Ship  
#1 ·
Despite being careful with what fuels l put in the tank of my 950 SM, l have sometimes had to use cheapo stuff. Although use of ethanol has been limited, the tank has some blistering starting.

Keen to sand it and repaint.

No idea what spec the KTM paint is, but this will need to be a DIY job as l dont trust a paint shop to use the right stuff and not fill the tank with dust etc.

Anyone used any black spray can paint that works?
 
Discussion starter · #5 ·
Hi David - sadly its the tank l got from you ..... its done well for years, but a couple of 'having to' fills with e10 have given it measles.

It only ever seems to be the 950 sm tanks and the early 950 adv tanks that suffer - the americans seem to suffer the worst, and go to the greatest lengths to try and combat it, most of which seems to involve tank lining and plastidip coatings. Not for me!
 
Discussion starter · #21 ·
I'll just need to be careful with sanding to not remove too much material and keep it clean - acetone helps clean and 'close off' the pores apparantly - l will also then inspect for any potential failures, fill, then 2k paint using the product above. I might even leave the base unpainted.

Looking at the fuel cap, the breather hose outlet is very small - l will look at enlarging that so fumes have a better exit.

And all because of a small number (3 or 4 max) of E10 fills.

I will need to ensure that l use BP E5 from now on entirely or carry Stabil for those E10 unplanned fills.

Bloody ethanol, but its only the 950 sm / 950 adv tank that suffers.

I understand from a dealer mech friend that some Triumph tanks are also suffering.
 
Discussion starter · #23 ·
The SE tank appears to be a different kettle of fish - no fuel damage at all, so l assume its a different plastic. My SE tank is blemish free, so l cant confirm if its painted or not.

Saying that, from what l have found, its only the 950 SM and early 950 ADV tanks that can suffer.

KTM painted some early plastics whilst some were just black plastic (even if both came from acerbis) no consistency!
 
Discussion starter · #27 ·
Hi John - l am talking about the 950 sm tank. AFAIK, the tank problem is just with the 950 sm and early 950 ADV's. Other bikes l have (inc the mighty se) are fine. Phew.
 
Discussion starter · #31 ·
No, not seen that - thank you.

I know, its an odd one, all of the documented problems only relate to the 2 specific bikes - ktm must have either changed the design (thicker wall structure, better inner layer [tanks are twin walled]) or changed the material make up in recognition of the multiple failures (that they didnt officially acknowledge. Again)
 
Discussion starter · #36 ·
Hello Brew - are you talking about the graphics only? The bubbling on mine is in the paint, as l dont have graphics fitted*, small bubbles a few mm accross, not the typical larger bubbles more common with the vinyl graphics.

When l was looking on the www l found something on an american site where someone painted the black graphics on with 2k paint, then someone else using another form of adhesive flat vinyl and then fake adhesive carbon fibre - all reported that the respective methods worked. There was also mention of a tank lining fluid, but most were dismissive.

* l was given a new sheet of oem sm graphics when my first tank sprung a leak from a captive nut - replaced by ktm - and the bike is now on its 4th tank in total - the first being the original, 2 replacements from ktm and the current one bought from a forum member - the bubbling has only happened since using a few tanks of e10.

You did well to get acerbis to comment.

If l had the ADV, l would go down the painted graphics route and stick with E5 an carry Stabil for any E10 fills.

I am generally on the ball, but a couple of "have to" E10 fills was enough to bring on the problem.