gas tank mystery solved!

So last night I was looking in my 80 750-4 LTD gas tank and saw a big piece of black crap. Turns out its the homemade gasket I made to plug my fuel sensor that was leaking. The rubber I used must not be gas resistant. At my work we have a plyable teflon gasket material I was thinking of trying. Anyone have any other advice for a good gas resistent material to make a gasket?

The reason why I dont use the sensor is it was leaking down the stem where the wires ran, plus I don't really care that much if it works or not.

The silver lining here is I thought I had a rust issue, but turns out the rust isn't too bad at all, it was the rubber plugging stuff up!

Maybe get a replacement fuel level sensor & install it w a new o-ring.
HarborFreight & other places sell metric nitrile o-ring kits.

I would buy those o-rings for this, but the its the really large o-ring (its oval and the size of your entire thumb, like the one on the petcock).

I haven't seen a nice sensor on ebay for a good price yet. if I come accross one, sure I'll pick it up, but at the time the bike needed to get running and prove it was somewhat reliable before I stuck too much $ into it.

An o-ring will work. Fit the o-ring into the groove, hold it in place using both hands, lower the sensor into the hole, hold it tight against the tank w one hand, then install the bolts w the other hand. I guess it takes some dexterity, but I thought it was easy.

Any new Nitrile, Viton(better supposedly), O-ring will work fine.

Peace.

OK, was digging around at work here and we have both nitrile and vitton gasket material. I was told to tell the difference is one of them "bounces" and one doesn't. So, we took a punch and kind of droped it on the rubber. I took the one that bounced because the storeroom guy thought that was the vitton one. You guys know any other way to tell the difference?

Working at a chemical plant, we got some nice goodies in the store room

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maybe I didn't explain it well enough, but the orgial leak wasn't around the perimeter of the sensor "mounting plate/surface" or the screws, but it was where the wires come through the plate from the sensor. There was a rubber grommet looking thing there, but it wasn't holding. So that's why I modified it.

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I agree. Just gotta find one

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I agree... I'm about as cheap as a SOB as you'll find.

Oxalic acid is brewin in the tank as we speak. Once the wife goes to work today, I'll go out there and finish it up.