Fuel tank issue with green coating
- Thread starter dolchok
- Start date
FrankBDPS
Well-Known Member
Back when these bikes were built Big Dog lined the tanks with that green liner you are seeing. That was before the government decided they needed to add ethanol to the chemical concoction we now call gasoline. Unfortunately the green tank liner material Big Dog used would not stand up to the ethanol in the new gas. So as you see it peels off. It is what it is. There are several threads on the forum about this issue. Some owners get in there and pull the loose stuff out and keep riding. Some owners strip the old liner out and do not reline their tanks and some go all the way and strip the old liner out and reline the tanks.
Don't forget to clean the screen on you're fuel shut off valve and if you don't have one yet you should install an inline fuel filter to keep that crap out of you're carb. Main thing is don't give up on you're bike. When you work through a few issues on it they are great bikes to own and ride.
Good luck and ride safely.
Don't forget to clean the screen on you're fuel shut off valve and if you don't have one yet you should install an inline fuel filter to keep that crap out of you're carb. Main thing is don't give up on you're bike. When you work through a few issues on it they are great bikes to own and ride.
Good luck and ride safely.
Dispatch
Active Member
Fix Motorcycle Gas Tank, Rust Removal, Lining, Sealing, Fuel tank
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Not spamming, I'm just passing on my personal experience, send your tank to them and it will be like brand new inside (like mine), they will polish the outside as well, price depends but I think on average Big Dog chopper tanks run 'about' $500, call them and see, give or take, expect also to pay 'about' $150 (mine went Fed Ex), to ship it to them plus the shipping materials to do so, they have a video on the website on how to ship it and what you need to buy.
Hope this helps...
Postmaster
Member
I used them. Took about 3 weeks from start to finish. They do an excellent job. Cant go wrong.
squat
Member
I just went through this with my ‘99 Prosport. Sloshed a cup of MEK ( dissolves many tank liners) around for 1/2 hour with a lightweight piece of chain, sucked out 95% of the MEK/liner syrup, let the remaining varnish-like coating dry thoroughly, done! You must plug all openings, protect the paint ( I used saran wrap and masking tape).
Some experts who work in the gasahol industry say its not the ethanol causing tank and fuel line damage, but the benzene, etc, added to increase octane. They insist that ethanol actually absorbs tank H2O condensation so it can be burned, and not sink to the tank bottom and cause rust. Acts like ethanol “gas line antifreeze”.
Some experts who work in the gasahol industry say its not the ethanol causing tank and fuel line damage, but the benzene, etc, added to increase octane. They insist that ethanol actually absorbs tank H2O condensation so it can be burned, and not sink to the tank bottom and cause rust. Acts like ethanol “gas line antifreeze”.