Welding vs a new frame?

[Drew]

So a 25mm long weld has the same strength as a 50mm long weld...
I think the idea was to make the weld longer... not build up metal in the same place...

Every welder you meet will assure you that there welding won't break....
I have only ever seen one broken weld... That was on a 90ton impact press..
But have seen heaps where the metal right beside the weld has broken..

Na, once again I have once again over abbreviated what I meant.

I mean that a big thick weld is often no stronger than a decent thin line. It's all about penetration with minimum heat as far as what I got the guy. He wasn't talking about his welds, we were discussing the welding on my Sidecar.

[nathanwhite]

Basically ... the same process required for "Boyracer" modifications. Certification is NOT done at an NZTA station. You can ask where your nearest vehicle certifier is at the nearest testing station.

Your local structural engineering workshop will have Certified Welders ... and may help with the paper work.

http://www.lvvta.org.nz/ easier to find em on that site I would think, not all that many do bike certs anyway. I'd be surprised if the welding approach is cheaper than just getting that second hand frame.

Ta. Will look into this.

I'd just get the thing welded, and go for gold. I would expect it to never be picked up in a warrant test, nor even if it needed to be re vinned.

I don't think a WoF testing station has looked at lower linkages on any of my bikes...

This is pretty much what I'm thinking. Don't point it out and feign ignorance if they find it.

just re read your original post

and although the situation is different to what I thought, the piece was organically cast, and not lugs welded on, I still say the same thing

buy a frame, if the guy doing the welding is saying that, he's pretty much telling you not to do it, it won't work

if you do end up getting it welded, please don't sell me your bike

Well having talked to him in person now and discussed different ways of reinforcing the piece, he is happy that it will be strong enough to cope. As Drew(?) pointed out, the action on the piece is pushing it back into the frame, not trying to tear it off.

Are you in the market for a midsize twin? Y'cant have it, but I do have a small naked that'll be up for grabs in a week or so.

[nathanwhite]

Hahaha, this thread has had over 500 views. So I reckon that's at least 200 people who, if in the market for an SV in the next 6 years or so will be checking the rear suspension for aftermarket welding.

[nathanwhite]

So the lug has been welded back on very nice and snug





Phil was confident that just having welded in a fair bit of material around the crack would be enough. For my peace of mind however I got him to put in the big triangular piece on the top.

[jonbuoy]

Hahaha, this thread has had over 500 views. So I reckon that's at least 200 people who, if in the market for an SV in the next 6 years or so will be checking the rear suspension for aftermarket welding.

As long as its done properly it wouldn´t bother me. Key word is "done properly". A good welder would probably take more time and attention to getting it right than is ever done when manufacturers weld frame parts together.

[nathanwhite]

As long as its done properly it wouldn´t bother me. Key word is "done properly". A good welder would probably take more time and attention to getting it right than is ever done when manufacturers weld frame parts together.

He did put a lot of time and attention into it. Only possible issue now is that the whole frame cannot be heat treated like it is at the manufacturers.

[nzspokes]

He did put a lot of time and attention into it. Only possible issue now is that the whole frame cannot be heat treated like it is at the manufacturers.

That would depend on the grade of alloy and if you can be arsed pulling the bike right apart.

[ducatilover]

I'd ride on that

[nathanwhite]

That would depend on the grade of alloy and if you can be arsed pulling the bike right apart.

Nope. If I was going that far, it would be either a new frame or for some reason like powdercoating the current one