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Old 15-09-2021, 08:07 PM   #2
Nickj
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Join Date: Jun 2007
Location: Forest Of Dean
Bike: S2r
Posts: 3,195
Quote:
Originally Posted by Jam911 View Post
...and how to avoid it.

Please discuss...
A. To avoid - Don't put any fuel containing ethanol into the tank.

B. To prevent - seal the tank with an ethanol proof slow set epoxy before you put any fuel containing ethanol.

To fix - Get another fuel tank which has had A or B preferably both.

If you can't get another tank put the swollen one in a warm place with a cheap peltier dehumifier for several months. It will reduce the swelling but not eliminate it, then seal and avoid ethanol.

Personal experience... I got a used tank that was a bit swollen but less than mine was, stuck it in the shed for 6 months with dehumifiers running, then sealed it, then got it repainted. It's not perfect size wise but has stayed where it was since.
You can either buy a 'kit' of sealer or get some slow set Phenol Novalac expoxy which is good with high ethanol concentrations and a bit cheaper. It's also very runny so you can get a good coating.
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