Watty !
You didnt need to wait so long.You could have bought the xt660r.It has the exact same motor.Compair the motors !
Not quite true Mr XT660R. While the Yammie is a very nice scoot and quite desirable, the only thing in common between the XT660R and The Pegasio 650 Trail is as you point out, the mill under the fuel tank. It is however
not the "exact same" motor.
The motor used by Aprilia is motivated by the same 659cc thumper as the Yamaha XT660, a fuel-injected single-cam engine built by Minarelli. It's oversquare at 100x84 but tuned to produce its 37kW maximum grunt at a lowish 6250rpm. That's about two kilowatts more than Yamaha claims thanks to a freer-flowing exhaust system. The point being that there are a few modifications introduced by the Italians, so not exactly the same motor, but rather a XT660 motor built under licence.
As to the rest of the bike. Sorry cannot agree. It is another bike - different frame, suspension, tank, controls, etc. ect. I am prepared to wait, I mean just look at the baby below!