I have owned a Seca II since late 1992. Purchased from a guy that told me it was too fast (wow).
I raced it in the 1993 Yamaha Seca Challenge series and won the national title (and quite a bit of Yamaha $$).
I don't ride the thing any longer. I rode it on the street for a few years after I quit racing but it is just too damned slow for me. Last year I put it back to full race prep and have it stored in my shop with a bunch of other race memorabilia.
Picture below is a cross post (I posted it in the pics forum as well). Hope y'all enjoy these bikes, I had a good time racing mine, and I still think it is a very handsome motorcycle.
Pic is turn 11 at Indianapolis Raceway Park. I led the race from flag to flag and took home $1000 Yamaha money.