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When i picked up this 85 gs450 i noticed there was black ick in the tank. The bike has sat since 08-09 with 1/4 yo 1/2 tank gas. Gas was still liquid and thin but if you rubbed your finger on the bottom it would leave a black film on your finger. I have worked with electrolysis for about 5 days changing it and cleaning the anode 2-3 times a day. No more rust . When i pulled the petcock (Was no good anyhow) the black stuff was all laying by the petcock. I flushed it pretty good Have a few small pin holes that are leaking but they are all up high none on the bottom. I have never seen anything that was black and orange. The tank looks like the inside has been etched pits everywhere. What does this crap look like to you. I am beginning to think the tank is junk but i will keep messing with it. 85-gs 450l tanks are hard to come by. Has nice paint and not dented up.
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Looks like rust to me.
I'd seal the tank with POR-15.1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
1985 GS1150ES stock with 85 Red E bodywork.
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Yes. It appears to be a rust liner.
and a +1 on POR-15Comment
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+2, follow the POR-15 directions exactly.Comment
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the reason i think it might be some kind of sealer the big orange pieces 1 side rusty the other is smooth as glassComment
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