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Custom Gas Tank Advice needed (its on the way)

770 Views 6 Replies 5 Participants Last post by  Sporty Kid
I got a stretch tank for my sporty on the way. Also the kreem kit to treat the inside. The tank has one flush mount cap. My question is I know the tank should be pressure tested, kreemed and painted. How do u pressure test? Do you do the kreem b4 the painting or after the painting? Any advice on this would be appreciated.
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OK, where's Jimmy K? ;)
Hey there! The first thing you want to do is pressure check your tank, then seal and then paint. Don't want to put on a purdy paintjob and then find out that you have to resolder the fuel outlet or something. You should use a hand pump of some sort since you don't need much pressure to check it. Using a high pressure source is asking for shrapnel! Your bike's gonna look sharp with that tank on it. Keep us up to date.
so, I guess I need a petcock installed to do the pressure test? and when do you do the kreem treatment?
I've got an article that gives step by step instructions on the whole process. I'll try to post it for you. May take time....got a real hectic day!
Kreem, or not?

I put a Quick-Bob tank on my Sportster a little over 2 years ago. I was talkin to my wrench bout Kreemin the tank. His advice was NOT to use Kreem. He said the Kreeme does nothing to stop any leaks, it's just to protect against rust in the tank. Also, he said the Kreeme will eventually come loose and when it does the problems start, the lesser just a stopped up petcock, the worse having to rebuild the carb. He suggested the following, which I did and have not had any problems with rust. Do this AFTER the tank is painted and ready to install.

1. Seal all the gas caps, fuel outlets, vents, etc.
2. Pour in a quart of KEROSENE.
3. Slosh it around good to coat the entire inside of the tank.
4. Leave it overnight, reslosh in the morning, and that evening, leaving the KEROSENE in the tank.
5. Just before you install the tank, pour out the KEROSENE and pour in a quart of GAS.
6. Slosh it all around, pour the GAS out and install the tank.

Now the most important thing to do:
Keep the tank full of gas. I don't mean stop every 50 miles to fill it up, but don't leave it for an extended period of time with less than half full. You won't have any rustin problems if you do this. If it's full of gas, moisture can't form inside to cause rust.

Sorry, can't help you on the pressure testing. I took mine to a auto radiator shop, where I thought they could test it, and they couldn't figure out how to seal all the outlets up to put pressure on it. I took a chance and it turned out to be ok. (I wish those damn aftermarket companies would detail how you're supposed to pressure test)

Since you're riding a Sportster, check out www.sportster.org

That's the BEST site on the web for Sportster owners!

Malfunction.....(SportyReb on www.sportster.org)
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More info on this (been there done ALLllll that stuff). :)

I got a stretch tank for mine also. Of course I did everything the hard way, so learn from my mistakes. :)

As soon as you get the tank, plug up all the holes (you can just use masking tape), put an air compressor hose to one of the holes, and pump it up with air (doesn't need much pressure at all). If you think you have a leak, spray shaving cream on the area, or a little soap - it will bubble if there is air coming out.

If there is a leak, send it back or have it fixed (we happened to know someone who knew a welder).

Then, BEFORE you have it painted (to avoid messing up the paint), decide weather or not to use the Kreem. I did and I regret it. Yes everyone says if you do it right and follow the instructions it works, but I did that (believe me, I'm a perfectionist when it comes to things like that) and half of it peeled, and I couldn't get the other half out, and every once in a while when I'm getting gas a little piece floats up to the top.

Anyway, if you DO decide to use the Kreem stuff, put acetone (can be picked up at the local Lowes or Home Depot in the paint section) and rinse the tank out with it. This will not only clean it really well, but will also etch the surface slightly so that the Kreem stuff will stick better. I'd go through several times of sloshing it around and putting new stuff in and sloshing it around, yadda yadda yadda.

Follow the instructions on the Kreem for the rest.

After all this, put the masking tape (if you took it off) back on all the holes of the tank (you don't want paint on the threads or the gas crossover connectors if you have that, etc). And get the thing painted.

Good luck. I'm WAyyyy too familiar with my tank now (did all this crap 2 years ago) so if you have any questions feel free to ask. :) HAVE FUN!
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