Having dispensed with the formal paperwork, for now at least, I was left with one document to deal with. In the bottom of one of the cardboard boxes that the bike was supplied in, was a receipt from 1985 for some suspension parts and bushes. This seemed like an opportunity to gain some knowledge of the bike's history.
Back to the bike. Having stripped the frame right down, I am left with a seized swing arm pin meaning that I cannot easily remove the swing arm. Options include 'brute force' and my favoured approach of 'nice and easy'.
By loosening the nut on the end of pin and placing the swing arm under tension with a large clamp, I simply kept applying copious amounts of penetrating oil and additional pressure each day until the arm started to move. On day three I found the clamp on the floor. The seized swing arm had moved under the pressure, brilliant! However, a few moments later with the realisation that it was the Solent Block bushes that had moved within the frame rather than the swing arm pivoting about the pin, I was left disappointed again.
I have now managed to locate and order a new BSA pin and bushes from a company in Austria. These should be with me soon, giving me the brute force option which simply means hacksawing through the bush and pin at each side of the swing arm.
The third disappointment came when I noticed the external engine casing sitting on my bench, it looked to be warped, offering it up to the engine confirmed this. The image below shows the casing sat on a piece of plate glass and it is clearly warped. The second image shows the casing offered up to the engine and confirms the worst. The only saving grace is that the engine casing on this model did not have the timing inspection cover whereas most other models had this improvement. Therefore I have two options, get this machined or get another casing with the inspection cover. I may even do both as part of me wants to keep this original as far as I can, Disappointing though.