Ducati Monster Forum

Moto Board => Tech => Topic started by: Howley on February 10, 2012, 04:30:23 AM

Title: M900 Leaky Tank Hinge Repair
Post by: Howley on February 10, 2012, 04:30:23 AM
Hi All,

I'm trying to fix the leaky tank hinge problem on my '94 900. I will do the KBS coating on the inside as soon as I can, but I want to JB weld it first to stop the leak. I tried to apply some today after cleaning the area with degreaser but it just fell off. What do I have to do to get it to stick?

Nate?

Thanks!
Title: Re: M900 Leaky Tank Hinge Repair
Post by: ducpainter on February 10, 2012, 04:33:43 AM
Quote from: Howley on February 10, 2012, 04:30:23 AM
Hi All,

I'm trying to fix the leaky tank hinge problem on my '94 900. I will do the KBS coating on the inside as soon as I can, but I want to JB weld it first to stop the leak. I tried to apply some today after cleaning the area with degreaser but it just fell off. What do I have to do to get it to stick?

Nate?

Thanks!
You rang?  ;D

Epoxy requires a bare metal surface to really stick. If not bare the paint has to be really scratched up with some scratches to the metal.

If you could get the area wire brushed, or better yet blasted it will stick.

I have to say I only got one to work doing it that way.

It's best to have it brazed.
Title: Re: M900 Leaky Tank Hinge Repair
Post by: greenmonster on February 10, 2012, 10:10:47 AM
Fixed a small oil leak on an engine w similar to JB, just a little less metal in the mix to make it more gooey and stickey.

Slow 24 hour Araldit fixed the hinge leak on my tank, 10 years now since that repair. No inside treatment done.

Both requires wire brush to metal clean surface.
Title: Re: M900 Leaky Tank Hinge Repair
Post by: Howley on February 10, 2012, 03:06:09 PM
Thanks for all the help. So just to confirm, I want to be putting the epoxy around the join between the tank and the plate that hinge is welded to?
Title: Re: M900 Leaky Tank Hinge Repair
Post by: ducpainter on February 10, 2012, 05:29:23 PM
Quote from: Howley on February 10, 2012, 03:06:09 PM
Thanks for all the help. So just to confirm, I want to be putting the epoxy around the join between the tank and the plate that hinge is welded to?
Yup...

pay close attention to the rearmost part of the plate.

That's where the flexing get's it's momentum.
Title: Re: M900 Leaky Tank Hinge Repair
Post by: pitbull on February 17, 2012, 01:59:10 PM
I've done the leaky hinges on both my girlfriend's 2000 900 and my 2001 900 with JB weld. I did my bike about 7 years ago and never had a leak since.
Title: Re: M900 Leaky Tank Hinge Repair
Post by: MonsterHPD on February 25, 2012, 02:36:32 PM
My daughters have always commented on how much they like the smell in our garage (where our cars have not been in at least 10 years  ;D ).
Last fall I had the feeling that the gasoline component of this garage smell was getting increasingly dominant. Since the lawn mower did not smell any worse than usual, Ol'Faithful seemed the likely culprit.
Having had advice from THE source, and after checking the alternatives, the hinge bracket seemed to be the culprit.

Using a hot air gun, and a monstrous soldering iron inherited from my granpa, this is what I did using body soldering tin bar (or whatever that's called in english).

So far, it's been tight for about 5 hours ...  [roll]       

(http://i855.photobucket.com/albums/ab117/Monsterhpd/DSC_0359.jpg)
Title: Re: M900 Leaky Tank Hinge Repair
Post by: ducpainter on February 25, 2012, 02:56:24 PM
Quote from: MonsterHPD on February 25, 2012, 02:36:32 PM
My daughters have always commented on how much they like the smell in our garage (where our cars have not been in at least 10 years  ;D ).
Last fall I had the feeling that the gasoline component of this garage smell was getting increasingly dominant. Since the lawn mower did not smell any worse than usual, Ol'Faithful seemed the likely culprit.
Having had advice from THE source, and after checking the alternatives, the hinge bracket seemed to be the culprit.

Using a hot air gun, and a monstrous soldering iron inherited from my granpa, this is what I did using body soldering tin bar (or whatever that's called in english).

So far, it's been tight for about 5 hours ...  [roll]       

(http://i855.photobucket.com/albums/ab117/Monsterhpd/DSC_0359.jpg)
Nice work.

That will work as long as you don't stress the hinge again and crack your solder job.
Title: Re: M900 Leaky Tank Hinge Repair
Post by: JDucati on February 25, 2012, 04:51:08 PM
My 03 M800 had the same issue and I took it to a local radiator repair shop.  For about 60 bucks they brazed the hinge and coated the inside of the tank.  They even pressure tested it.   Hasn't leaked a bit since. 


~JD
Title: Re: M900 Leaky Tank Hinge Repair
Post by: muskrat on February 25, 2012, 05:26:04 PM
JB weld will hold.....to a point.  spend the money and get it done right.  I spent $100 locally and it looks brand new.
Title: Re: M900 Leaky Tank Hinge Repair
Post by: ducpainter on February 25, 2012, 05:28:05 PM
Quote from: JDucati on February 25, 2012, 04:51:08 PM
My 03 M800 had the same issue and I took it to a local radiator repair shop.  For about 60 bucks they brazed the hinge and coated the inside of the tank.  They even pressure tested it.   Hasn't leaked a bit since. 


~JD

That's a great price.

What did they coat it with?

Did they prime the heat affected area too?
Title: Re: M900 Leaky Tank Hinge Repair
Post by: Howley on February 25, 2012, 06:34:02 PM
I ended up doing mine with permetex cold weld. Holding up fine so far, although it hadn't been ridden yet.