Aluminum welding?

[F5 Dave]

The mounts are made from two pieces of 30x30 4.5mm angle. On each side. So it will end up as a sort of 9mm thick cross. I think that will be sufficient. . .

I don't. ..

[gatch]

The mounts are made from two pieces of 30x30 4.5mm angle. On each side. So it will end up as a sort of 9mm thick cross. I think that will be sufficient.

Thanks for the advice, I will try, but no doubt whoever welds it up will have a good laugh at me.

I'd be using some 40-60mm round stock.. It would not cost much at all to get someone to turn something usable up..

[jasonu]

[QUOTE=F5 Dave;1129823895]He's in Wgtn Nobber!

Mate, if I had known he was a Wellingdick I wouldn't have bothered offering advice...

[Moooools]

Wow. Really that big?
The new mounts are twice the thickness as the originals, and about the same length. (40mm).
Perhaps you have the wrong interpretation of where these mounts are, or perhaps I am just ignorant. I will try to explain, but will get some pics tomorrow.

The mounts will be welded to an original cross member between the two castings at the swinging arm. They will be perpendicular to this cross member and about 40mm in length, protruting forwards at about 20 degrees from vertical, to meet the lower engine mounts of the engine.

I don't really get how you mean to use bar stock for mounts?

[Yow Ling]

Wow. Really that big?
The new mounts are twice the thickness as the originals, and about the same length. (40mm).
Perhaps you have the wrong interpretation of where these mounts are, or perhaps I am just ignorant. I will try to explain, but will get some pics tomorrow.

The mounts will be welded to an original cross member between the two castings at the swinging arm. They will be perpendicular to this cross member and about 40mm in length, protruting forwards at about 20 degrees from vertical, to meet the lower engine mounts of the engine.

I don't really get how you mean to use bar stock for mounts?

Dont overanalyse this, if you think your brackets are up to it go for it , if they break revise your plan. My TZR framed FXR has 6mm brackets welded in they havnt broken yet, however the steel engine cradle has cracked several times.

[Moooools]

Dont overanalyse this, if you think your brackets are up to it go for it , if they break revise your plan. My TZR framed FXR has 6mm brackets welded in they havnt broken yet, however the steel engine cradle has cracked several times.

Thanks, I am not using the original cradle (if that was what you were referring to) but there will be a mount to the top of the engine and four mounts on the back.

I think they will be fine, I have tried to over engineer them.
Here are some pics anyway.

[F5 Dave]

Wow. Really that big?
The new mounts are twice the thickness as the originals, and about the same length. (40mm).
. . .

The old engine as a 2 stroke twin with rubber bushes would be considerably more smooth than a solid mount 4 stroke single being thrashed a few thousand rpm over it's intended rev range. But go right ahead.

[Moooools]

The old engine as a 2 stroke twin with rubber bushes would be considerably more smooth than a solid mount 4 stroke single being thrashed a few thousand rpm over it's intended rev range. But go right ahead.

Correction: 4 stroke twin...
But the rest is valid.

[F5 Dave]

Ah, pics so dark I didn't spot that.

[schrodingers cat]

Nah - you'll be right. Put a nice radius on the angle for that 'professional' look and away you go.

Specifically ask the welderer man to put a little bit of preheat into the frame to make sure you get lots o penetration.

The advise about prepping the weld area is spot on. Make sure you scuff up a good 25mm all around the weld. Also scuff up the brackets around the weld area.
Gice it all a good clean with meths
If it cracks (and I don't think it should) then rethink it in light of your experience

[gatch]

Wow. Really that big?

I don't really get how you mean to use bar stock for mounts?

I use bar stock for everything. Fits in a lathe better than angle..

[F5 Dave]

Ahh fit the 4 jaw lazy.

[gatch]

A foreshore ?

Nar we can't afford to pay the locals what they are asking..

Going to get my Norton sponsor to weld up my vfr peg hanger this weekend. An m10 bolt doesn't look too flashl on the road..