OzVMX Forum

Marque Remarks => Yamaha => Topic started by: ola_martin on February 11, 2009, 10:05:16 pm

Title: YZ125 tank
Post by: ola_martin on February 11, 2009, 10:05:16 pm

Hello.
I got a YZ125-76 tank for my HL-replica. I want to pull out some dents before I paint it, therefore I need to know if the alloy is good for welding. Has anyone of you welded these tanks before?

Thanks

Title: Re: YZ125 tank
Post by: albrid-3 on February 11, 2009, 10:26:03 pm

does anybody have a spare YZ 125 A tank to sell.
thanks
david

Title: Re: YZ125 tank
Post by: Rossvickicampbell on February 11, 2009, 11:03:52 pm

Ola_Martin - contact Geoff Morris at GMC - he is awesome with this sort of thing and will soon be able to answer what you are after!

cheers

Rossco

Title: Re: YZ125 tank
Post by: mxmaniac on February 13, 2009, 08:50:27 pm

I have a metal MX100 tank that is in good nick thats red with white stripe and MX100 written on it? Do they suit HL?

Title: Re: YZ125 tank
Post by: Marc.com on February 14, 2009, 12:54:07 am

Hi Ola,

might have a decent one for you if you are not in a rush.

BR Marc

Title: Re: YZ125 tank
Post by: GMC on February 15, 2009, 06:41:55 pm

Quote from: ola_martin on February 11, 2009, 10:05:16 pm

Hello.
I got a YZ125-76 tank for my HL-replica. I want to pull out some dents before I paint it, therefore I need to know if the alloy is good for welding. Has anyone of you welded these tanks before?

Thanks

Have welded many tanks, they all weld fine with TIG, forget trying to do one with MIG.

Title: Re: YZ125 tank
Post by: lms6201 on February 16, 2009, 06:42:43 am

a bloke here was selling a plastic tank from an early tt250 , they look very similar and have the big tunnell for the mono , any use ?

Title: Re: YZ125 tank
Post by: ola_martin on February 16, 2009, 07:40:19 pm

Thanks, GMC!

My plan is to drill and thread some say 4-5mm holes in the dent, then use screws and heat to pull them out a bit. Then weld up the hole. Anyone with better ideas?

Thanks

Title: Re: YZ125 tank
Post by: GMC on February 16, 2009, 08:10:10 pm

Quote from: ola_martin on February 16, 2009, 07:40:19 pm

Thanks, GMC!

My plan is to drill and thread some say 4-5mm holes in the dent, then use screws and heat to pull them out a bit. Then weld up the hole. Anyone with better ideas?

Thanks

Not a good way to do it.
Tanks tend to have flattish sides & getting the sides of the tank right is the hardest part.
Welding on the sides to fill the holes can often make the sides suck in a bit.

One way is to take the tank apart at the seems, panel beat, then weld back together.
This can produce good results but can also be very time consuming. Often the seams can have mounts etc. over top of them or joining the halves together making it hard to get them apart & back together.

My preferred way is via keyhole surgery by means of holes in the underneath side to allow dolly bars to push the dents out. You need to be able to feel the tank to judge when they are right & holes in the side would also make that hard.
I usually pre-polish so I know they look right then weld the holes up underneath.

Title: Re: YZ125 tank
Post by: LWC82PE on February 16, 2009, 08:20:26 pm

Both methods GMC suggested is what i would recommend and also do with steel tanks, and are the methods that most professionals use. I do not know any professionals that use those other sorts of methods like air and filling with water and freezing so i i think that says something.

Title: Re: YZ125 tank
Post by: albrid-3 on February 16, 2009, 10:04:27 pm

Stick with GMC, he knows his stuff

Title: Re: YZ125 tank
Post by: ola_martin on February 16, 2009, 10:51:59 pm

Thanks.
This isn't going to be a polished bare aluminium tank, I'm going to paint it. Just wanted to pull out the dents a bit reduce the thickness of the bodyfiller required.
Since I don't have a Alu-TIG myself I have to send it away for welding, therefore I wanted to keep the welding to a minimum.

-GMC, Can you sell me a leftside HL-exhaust without the fittingbrackets welded on? What's your price on these exhausts?