torque arm bracket

[spyke]

Hi chaps,

Someone pop out to the garage/shed for me!
If youve got a single width rear hub that is, the rest of you carry on with what you were doing.
Ive made a new bracket (to go on the lower swing arm) bolted it to the torque arm,centered up the rear wheel and measured the distance along the swing arm for it to go, rotated the brake plate to the correct oclock.What I cant tell from any picture is does it sit on the centreline of the SA tube, or offset to the inside somewhat as mine is sitting.(my torque arm is new and dead straight) .As soon as I know this and weld it on, all my frame conversion is finished and I can paint me frame, so would appreciate any replies.

Cheers Spyke

[muskrat]

G'day Spyke,
                 I have a '56 SS The bolt is 9" from pivot and 1" inside S/A.
Cheers

[tombeau]

Hi Spyke,
I just popped out and had a look at mine. I laid a steel rule against the side of the swinging arm and used the antennae on my set of "verynears" Obviously the swinging arm splays out and the bracket runs straight. The distance between the bracket and the outside edge of the swinging arm was 18mm at the front and 22mm at the back. I had hoped to measure it with an adjustable T-square, but just couldn't get it in around brake rods footrest handgers etc. It might be better to find someone who has a swing arm out of the bike. Sorry about the quality of the pictures.
 
Cheers,
Iain  

[RichardL]

Spyke,

You're converting to a half-width brake, correct? I can't quite tell from the photo or remember what Tombeau has, probabaly one of every variety.

Here are pictures of mine. You can see that the bar (or, "my bar", no humor inteneded) has a bend. Also. You will also see that, as far as I can tell from looking at it and at the picture, it is centered (makes sense). I am incuding a straight-on picture of the brake plate so you can compare position.

Hope this helps.

Richard L.

Edit:  I am only assuming that the bar on my bike is as original. However, I cannot be one-hundred percent sure, never having compared mine with others. Also, If I had known anyone would look so closely at this part I would have included it in the "re-chome" group.

[tombeau]

Half-width "goldie" aka B31 rod operated brake swing arm.
Sorry about the quality of photos. I think my camera is dying.everything keeps going purple and blurry on it.
My bar has no bend, its straight.
But my bike is as Richard suggests, a real hodge podge of bits and pieces

[alanp]

Yikes! Doesn't 50 odd years of keeping these things on the road create some 'interesting' variations. BSA would be proud of us!

[RichardL]

Ah! Tombeau's is to the inside and mine is to the outside, explaining straight vs. bent. I don't know which is original. Mine is as I bought it in '73. Nevertheless, I believe bracket on the centerline is correct.

Richard L.

[beezalex]

I believe it matters what brake plate you are using.  The alloy plates put the torque arm farhter outboard, I believe.

I say weld the sucker where it fits right and don't worry too much about originality...

[tombeau]

I agree entirely.
And to quote the man himself:

"not worried about authenticity ,its not a replica, i just like that look and its going to be ridden every day rain or shine so asthetics not important "

Cheers,
Iain