Thanks guys, With regards to the paint job I bought it like this and it polished up nicely so I left it and it looks better than standard in my opinion, it was an ex race bike. In the flesh it really stands out and I quite like it too. I know these aren't the sort after NSR's but as they only made them for a year they are rare and anyone who knows the many 250 2 strokes aren't familiar with the 16's so it always draws a crowd more than the SP which is strange.
I had a MC18 engine which luckily enough used the datum crank from that for the 16 crank so I can use the later seals as the 16 is no longer available so hopefully will be on the road for a long time.