Many thanks again, I went to look at the bike yesterday , thanks for the details given concerning the model No.s etc most enlightening , also spoke to Bob Wright, very helpful, the bike I think I have established now is a 125 and not the 200 and is about 1978 in vintage , so the tank is a little broader and not as slim as you get on the slightly later bikes, it does run and I had a ride up the field on it, its pretty tired though, I think to make it nice you could soon get rid of a thousand pounds but I suppose you would have a nice little bike in the end, the chap is fixed at £400 which you can't blame him for that as you can't get much for that, being a complete novice at re building something apart from being fanatical about detail, I will have to make my mind up to buy the bike or not.. thanks to all