I understood that SV-650s prepared to Supersport spec will be allowed in ULWSB... just rumor and hear-say.
I think this makes a lot of sense, as the SV is, build-for-build, decidedly faster than anything in ULWSB. So, if any rules makers are reading this, consider that my vote.
I think a SS SV-650 (okay, maybe not Ed Key's SS 650) would be a good match for a 400 with wheels, forks, and a hotter motor...
Also, there seems to be such a performance gap between SuperSport and Superbike lightweights (SVs in particular), that the SS guys currently have only one race to grid up for where they're 'optimized.'
You know, a lot of people complain about SVs being class overdogs. I should, as I'll hopefully be on the ULSB grid next year not on an SV (shhh)... But all classes can't be even. All bikes aren't created equal. I'm just thankful that, in this case, the class overdog is an economical streetbike as opposed to a $18k Ducati 1098S or a $30k Bimita.