The Trinity cylinders are a new casting that look pretty good, I don't know if it is the same as the White Knuckle or not. If you do not need to replace your cylinder, or if you are looking for the biggest bang for your buck, I wouldn't really spend the money on a big bore kit. The prep work to make Cometic gaskets (the only thing available) seal is miserable. A stroker kit is FAR superior at making power gains on the 700. The big bore can be worth a horse or so in a couple of places in the RPM range, but a stroker kit makes power everywhere. The factory head gasket is a work of art and the most desirable for the stock bore. Beware of high torque studs, they will pull the bore out of round, and you can leave power on the table with lost ring seal.
The XT660 Super Motard and the Aprilia 650 Pegaso have the same engine as the 700 with a smaller bore, and the same 9mm Yamaha factory head bolts easily go to 36 ft-lbs in those engines because there is more meat in the bore(100mm).