Mick, My crash / badge / oil gauge / clock bar on the KH(A) is based on the Britax bar so the dimensions are similar, although not identical in one or two places. Each bar is 12" long and made from 1.150" hex. The hex is probably what I could find so the dimension may not be the same as th...

Luis,

I would advise making the nipple from brass. It is easier to solder on to the pipe and being softer than steel, the taper seals more easily.

Can you provide a photo? The lock screws I know of are closer to 2BA than 7BA but might be 1BA or even 0BA. A photo would tell me whether I have one here to measure.

Assuming by badge bar that you mean the bar through the front top sidecar mount, these are / were a standard Britax item. They are easy enough to replicate if you have a lathe, as I have done for the one on my KH(A) on which I have mounted oil gauge and clock as extras. But make the stud connecting ...

Wow! This has massive potential for rusty mudguards and the like. Presumably you are highly competent at rubbing down to achieve such a good result?

SAND blast it, then slap the desert camoflage paint on with a 4 inch paintbrush, rough as you like.

Western desert, WW2 original paintwork, with something to protect the metal underneath.

I think you will find that these are indeed toolboxes, but are on inferior makes of bike, not Ariels.

You have a PM.

There is no special tool to the best of my knowledge but, from experience, an extensive repertoire of bad language is a great help.

Above the guide. There is nothing between guide and rocker box but when fitting the guides, I put a smear of blue hylomar round the guide under the lip. Having warmed the head and (already fitted) rocker box in the oven, when you fit the guide the hylomar will give you a good but flexible seal betwe...