well guys it looks a bit twee to me , they were quite a lump , I have not own one but ridden a mates many times when I was an apprentice , the old days when some off shore bikes had the gear change on the wrong side

the guy in question had a SS100 but he would not let me have a go on that
these are the days before you had to wear a brain bucket
I am basing my comments on his hand on the seat those seats were ample that looks a bit small , but as usual I may be totally wrong in my assumptions
Stuart
PS just had a look at Bonhams and the tank looks OK but I am not convinced its full size
http://www.bonhams.com/press_release/13490/