I got my Riva for a couple reasons
4 stroke reliability (I always seem to foul plugs on a 2 and for a put put I don't want to worry)
Didn't have to assemble it, it was used. (IIRC, the vento has to be put together...)
CVT twist n go tranny. (I drive a stick car, though)
My dad won't let me steal his 1200cc Sporty, though I'm pretty sure the Riva's more fun.
1994 Yamaha Riva 125