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Old 08-22-2014, 01:19 PM   #1
cwmattox OP
Joined: Feb 2014
Location: Oklahoma
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Airtech gas tanks?

Starting to collect parts for my sportster scrambler...looking at fuel options for more fuel. Does anybody have any experience with fiberglass fuel tanks? Pros / cons? They've got 5.5 and 6.5 gallon road race tanks that will fit my 99 sportster.
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Old 08-23-2014, 05:22 AM   #2
BiGR Rich
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I've no experience personally, but I can tell you that fiberglass tanks eventually break down from gasoline. I guy I know made a fiberglass / kevlar tank for a cb550 and he would drain the gas from it if he wasn't going to ride it for a day or two.

Matter of fact, Sean from RocCityCafe refuses to make fiberglass tanks for that exact reason.
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Old 08-23-2014, 06:55 AM   #3
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Epoxy, not fiberglass resin

Big Rich is right, fiberglass epoxy will not resist ethanol. Doing some research for my project bike, I found this post. I have to build tanks for my project as none available will work. Steel or aluminum would work, but I can not make them.
Seems there are lots of ways to do it wrong. This one has a good description and lots of photos.
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Old 08-23-2014, 06:23 PM   #4
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Using an epoxy liner eliminates the problems with ethanol in a fiberglass tank. If making a new tank you'd use a vinyl-ester resin instead of a polyester resin.
Mixing metaphors is like killing two birds with a dog that won't hunt.
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Old 08-23-2014, 08:41 PM   #5
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Bought a tank from airtech they give you an option to have it lined, was worth the extra$
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Old 08-24-2014, 07:18 AM   #6
bk brkr baker
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I ran a fiberglass tank on my 860 Ducati for years, no problems. The tank was made by Syd's Cycles in St.Petersbug ,Fla.
Malclom said after the tank was mde they coated in insides with an e-poxie with this superfine glass dust or balls mixed in to seal the glass . This was done to prevent leaks, but there was ethanol being added to the gas in those years and I never had any problems with the tank.
I raced a Bevel drive 750 SS with a fiberglass tank for years and race gas didn't bother it either. The tank was pretty tough too. I had a few lowsides and it stayed intact. YMMV.
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