Sir, you're gas tank is leaking......!

mikaleno

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I've got the stock motorized bike gas tank and both the back threaded stud's are leaking gas.............Nice.

So what the best way to fix it????

Liquid steel, have some bloke weld it? I hate to bin it because it's a chrome one.
 
L

Large Filipino

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Are the studs loose to the tank? Have you tried turning them in clockwise?
I use this stuff called water weld when I modded my tank and got a different cap for it. It holds in the gas pretty good. It's a putty when mixed with your fingers dries rock hard.
 

mikaleno

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Leaking??

I just had the tank off, the stud's aren't loose. They look like their welded on from the inside before they put the top half of the tank on.....Velry tlickey. While I had it off I drained it, fill up the sink with water put the tank in and blew like **** through the cap to pressurized it with the pet cox closed.......
Wow! I feel a little tipsy.......:yuck:

Could not get bubbles or no sign of a leak???????? You mean to tell me gas can get though, but pressurized air can't???

Oh well, I'll try filling it up tomorrow to see if it's still leaking, it gets a little smelly when you live in a bachelor apt.

Thanks' for the help mate!
 
L

Large Filipino

Guest
Check your fuel line. Some of us use that clear stuff that gets hard with age and that's cool. I use an automotive fuel line and I needed to clamp it down with a hose clamp or it would leak.
I bet your tank was leaking from there and the gas ran under so it appeared to be running from the screws.
 

mikaleno

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I bet you're right, every gas line I've put on there has leaked. I always thought people were selling me vacuum hose instead of gas line. Yes, that clear line works great on my other bike, I may have to order some more.

Good thing I took the gas tank off because I noticed all kinds of rust and crud in the thing. Put some gas in and swished it around and pored it out the pet cox. Yes I cleaned the fuel filler, and I have a in line one also.

I'll try the hose clamps.

Thanks' again LF, you're on it!
 

Warner

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I bet you're right, every gas line I've put on there has leaked. I always thought people were selling me vacuum hose instead of gas line. Yes, that clear line works great on my other bike, I may have to order some more.

Good thing I took the gas tank off because I noticed all kinds of rust and crud in the thing. Put some gas in and swished it around and pored it out the pet cox. Yes I cleaned the fuel filler, and I have a in line one also.

I'll try the hose clamps.

Thanks' again LF, you're on it!

That is why plastic tanks rock. (and why the motorcycle manufactuers paint the INSIDE of their tanks too). A plain steel tank without some type of rust inhibitor will rust very quickly.

Warner
 

Chuck L

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brazing gas tank

I have had this problem on a half dozen tanks mounted to the frame the way the kit instructions tell you to mount the tank.What I have done is braze the tank around the studs and repaint bottom of tank, problem solved. Caution make sure tank is dry and aired out good befor brazing. I have also made a mandrel which I set up in an engine press to bend brackets to fit my frames which I then weld to my frames, then I use 4 rubber isolaters on each stud of the tank then remount tank to frame, this solve the leaking tank problem permently.My source for the mounts is Enterprise Rubber Inc. 1-330-633-7460 Part# M4-141094-R40. This rubber mount is 1x3/4 with 1.0 meteric thread with 1/2 female and 1/2 male, screws onto tank fit through mounts on frame. Good luck
 

mikaleno

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Thanks CL, I ordered some Por-15. I'm going to look into the brazing also, I'll have to learn how to do that. Rubber mounts are good to, the problem is if those studs have any pressure on them when you tighten the tank down you will have trouble. As it was the back mount was broken when I took the tank off....So to much pressure.
 

mikaleno

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Sir, you're a welder!

Thanks CL,

You gave me the stones to try my hand at Brazing that tank. Bought a little welder kit at True Value Hardware. Just make sure you grind/sand around those stud's so you get a clean weld, (yes, wash that tank out good first). Then I got some little rubber gaskets that they put in faucets that looked about the right size. Put that between the tank and the mount and don't over torque the nuts.

No more leak's..........!!!
 

thebigz

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Hi... I have a similar problem - but with the gas cap. It rattles but it also let's gas come out - especially if I hit bumps.... Should I replace the cap? or gaskets? I tried finding a new cap at a local auto store - no go... Is there a place where I could get one? url?

Also, I purchased some extreeme heat paint to paint the motor... Could I also just paint the gas tank with it? Would this prevent rusting?
 
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