Thanks for all the additional information. I think I need to clarify my position with the bike. My mind runs projects and plans these out, that's how it works for me so I absorb as much as I can by whatever route I can. I am not really in the market for a show winner or a trick bike. My views is to run it looking like it could do with some cosmetic work but mechanically perfect. I am not fussed about running it as a 250 either, I brought it as a non runner and, as soon as I get a little time, it will be a runner. A lot of my questions are around identifying what is what. And I am learning. I don't want to order parts to find they don't fit so research is important to me. Identifying the forks means that I can look at fork seals and head bearings which will fit. The spannies will be a big investment. I don't want to buy a set that I can't use when I drop a 400 lump back into it. It may be a case of just getting some scummy ones cheap for a 250 to get it on its way. Knowing that the calipers are from the c/d model means I can get piston and seal kits for them and they will fit. I will look at the sump plug later to see if it is wired, that is quite a give away as to any race heritage. As for the doner bike and engine, I am already on the case. Maybe the plan is to run 2 of them, one a 400 and one a 250. Not sure yet but doner plans are already running. I do really appreciate the info from all but it is my first 400 rd. Cheers.