1961 CB72 Project

[Seadog]

You’ve been productive. Nice job on that drill guide bushing and congratulations on working that thing out of the floor peg hanger. I’ve stared at the threaded conical end and just cannot think of what it might have been for. Well done on both tasks.

[G-Man]

Seadog

Thanks for the kind words. I just needed some small jobs to get back into the swing of being in the workshiop. I'm back on my travels next Tuesday so it wasn't worth getting started on something for my main project, although a rather nice reproduction seat foam arrived in the post today....

G

You’ve been productive. Nice job on that drill guide bushing and congratulations on working that thing out of the floor peg hanger. I’ve stared at the threaded conical end and just cannot think of what it might have been for. Well done on both tasks.

[G-Man]

Back from my latest US trip and still feeling a bit 'below-par' for any workshop action with dangerous tools. Just before I went away a replacement seat foam turned up so I though I'd better pull out the rather horrible-looking seat for this project.



Early seats had bolted on brackets and attached to a frame that did not have the lugs on the rear frame rails. This leads to them being called 'short' seats but it is really only that the rear brackets are further forward.

The new seat foam looks longer here but that is just perspective. They look pretty well matched to me.



I have also got a couple of vinyl samples as I think the modern replacement covers are just too bright.

I've been putting this off for far too long. Time to get to work on rescuing this seat...

G

[Seadog]

What is all over the seat pan - rust? Peeling paint? Will you treat that first?

[G-Man]

Seadog

Just horrible rust like the rest of the bike. May have to scrap this base and start again but we'll see. Yes, It will all be cleaned up and painted before re-covering.

G

What is all over the seat pan - rust? Peeling paint? Will you treat that first?

[DJM]

Not sure how that would work; I think the whole point of these kits is that the welding rod (actually it's solder) melts at a much lower temperature than the parts you're trying to repair.

If you made the rod from the same material as the parts that wouldn't happen, the donor rod wouldn't melt until it reached the same temperature as the components when the whole lot would go very quickly from a solid to a liquid state, there's a word for that critical point, I think s**t is the word I've heard used!

[G-Man]

DJM

I think you posted to the wrong part of the thread but yes - you are correct. Using the parent metal for the filler, the only option is to use conventional aluminium welding with a TiG or Oxyacetylene set.

G

Not sure how that would work; I think the whole point of these kits is that the welding rod (actually it's solder) melts at a much lower temperature than the parts you're trying to repair.

If you made the rod from the same material as the parts that wouldn't happen, the donor rod wouldn't melt until it reached the same temperature as the components when the whole lot would go very quickly from a solid to a liquid state, there's a word for that critical point, I think s**t is the word I've heard used!