Like the others say.
The Yuasa YTZ range have about the best cold cranking performance "bang for buck" of any battery at the moment. A YTZ-10S will certainly do the job, it's about the same size as a "standard" curvey battery but better CCA spec, I had one on my Deauville for years with no probs.
They do a
YTZ 7S with a CCA of 130A, compared to the 190A of the
YTZ 10S . It might just about cope if you only use the bike in favourable conditions (not excessively cold and keep it fully charged etc). The 7 is a somewhat different shape format compared to the 10, 113x70x105 vs 150x87x93 , might be help or hindrance.
I doubt very much anything less than 130A would like it much starting an SV650.