Thanks for the welcome Andy, and thanks for the info, I may well be popping into on of the local bike shops tomorrow to A) Show off, and B) pick their brains on oil, The shop I am thinking of are big into motorcross and I think still race two strokes, if not, they are proper enthusiasts anyway not just out to fleece their customers.

Not being an experienced Honda let alone NSR expert, I have to be honest, I had never seen or heard of the "Cabin" edition, in fact I can only bearly remember the Cabin Hondas back in the day of 250 GP racing, if you had asked me to list out the liveries of the time I probably have omitted them entirely.
That said, I have been led to believe that they are very rare, my research tells me that only 2000 were ever produced world wide and online searches lead to very few actually being around now. I have to say that I still rate the Rothmans colours on an NSR as one of the sexiest bikes ever but for what I paid for my bike I would appear very ungrateful to complain.
I will have a look at your pipes and consider them as an option, if standard pipes in good condition are as sought after as in the TZR world, it seem a wise ting to save them for future use, I will let you know.

Many thanks again.