Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Yep that's an F swinging arm, massive closed loop rear brackets with the left hand one having the drilling for the chain guard stay. Shame they didn't bother keeping the chrome cleaner. Needs new bushes. Fit phosphor bronze ones instead of the OE fibre ones.
Alex your in Europe yes?If so lots of German sellers sell the bronze bushes. As Bryan says, check the internal collar, which is just the big tube running through the arm, check the ends where it sits inside the bushes, most are worn and will show that wear, some are rusted (which is odd considering they are supposed to be covered in grease). If it's worn your going to have to decide whether to reuse it or replace it, post a pic of how it looks and we'll advice.As for the old bushes, they are just fibre, a quick run with a small hacksaw blade (like the centre stand pivot pin) and they'll just fall out usually. Once you get one out you can sometimes find a socket exactly the right size to fit inside the arm and use that to drive out the other. Other alternative is to fit a needle roller conversion kit which comes with it's own collar, they are around £125 which sounds a lot but a set of bronze bushes is £30ish, new collar is £70 or so so not that much dearer and they stiffen up the arm much better or are supposed to, never tried one myself but I'm thinking about it right now.
Er What?