Gas tank leaks

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I am new to mopeds and repairs. Gas tank leaks, pin hole or cracks near the tank/seatpost junction. Tried to repair with "seal all" product. Didnt work. Repair tutorial says just get a new frame. That would be a huge undertaking for me. Just wondering if there are any other things to try first. Other product? Or external gas tank perhaps...
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Re: Gas tank leaks

Maybe something like this would be worth a shot :

Re: Gas tank leaks

Bad juju. Time for a new frame.

Re: Gas tank leaks

> Aaron Blair Wrote:

> -------------------------------------------------------

> Bad juju. Time for a new frame.

He could also have a new section welded in . The frame 'looks' pretty good , but for the rust area .

Re: Gas tank leaks

Moped Lar (OFMC) /

That frame is weakened and compromised. I would replace the frame. Not a big deal to do a frame swap.

Re: Gas tank leaks

> Moped Lar (OFMC) Wrote:

> -------------------------------------------------------

> That frame is weakened and compromised. I would replace the frame. Not a

> big deal to do a frame swap.

So , you think the frame is beyond repair and possibly reinforcement ?

Re: Gas tank leaks

There is really no way to know just from a picture. I suppose you could clean the tank real well inside and use a borescope to see the extent of the damage down in the bottom. If it's just a small area of pitting with small pin holes it could potentially be brazed up.

Re: Gas tank leaks

> Moped Lar (OFMC) Wrote:

> -------------------------------------------------------

> That frame is weakened and compromised. I would replace the frame. Not a

> big deal to do a frame swap.

^ This,unless you want to do a lot of welding. That is a critical point in the frame, forget the gas tank.

Re: Gas tank leaks

just add a tank on the back rack n call it good.

Re: Gas tank leaks

Monocoque bikes have issues when the base of the fuel tank has a hole, it can weaken the frame. DO NOT TRY TO JUST EPOXY IT. The bike may fold like a taco on you, likely while doing 50km/h...

Best suggestion is to poke really severely at the rust to determine how bad it is, it likely need welding a patch on it. Bet to do that anyhow, and get yourself a upper stress bar to brace the frame. Does not have to be a huge bar, just a goodly strong one. You will lose the helmet holder (that no one ever uses) when you add the bar between the seat post tube and the fork tube.

Re: Gas tank leaks

> Saabsonettguy . Wrote:

> -------------------------------------------------------

> There is really no way to know just from a picture. I suppose you could

> clean the tank real well inside and use a borescope to see the extent of

> the damage down in the bottom. If it's just a small area of pitting with

> small pin holes it could potentially be brazed up.

I would do this first^^

Assess and go from there.

When it comes to rust, theres always more than meets the eye. If its very bad, replace it and dont risk your life taking the easy way out.

Re: Gas tank leaks

Mmmm, folded taco!! I mean get a new frame, not worth eating the asphalt. Get the right frame and its all bolt on stuff

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