Hi -
Found your bike on this page, http://dailyreferendum.blogspot.com/2013/01/my-1980-yamaha-sr250-build-nearly.html
and literally joined this site JUST to read the entire build story.
It's amazing, and so well done.
I just found an SR250 in the want ads locally: http://images.craigslist.org/00A0A_f8gXm4WFpOc_600x450.jpg and hope I can do 1/4 of what you did to yours to this one.
My biggest question is - can you explain a little bit about seat fitment? I've always wondered about how people fit cafe-style seats to existing bikes. Does it bolt on, is it hinged like a normal seat, how exactly do you measure or choose which one to buy?
Thanks in advance, and FANTASTIC job!
~Adam / Dallas TX