Hello! I registered just to post in this thread. The motor specs appear to be exact same as the ER-6n, which according to Kawasaki's site, claims to produce 71.4HP and 50ft-lbs. of torque.
According to recent dyno's of 2006 600cc. (and 636cc) Sport Bike's, producing 100-108 rwhp, this seems pretty anemic. However, those same dyno's show only 40-42 ft.-lbs. MAX torque. Not to mention, the 650R makes it's max torque at 7,000rpm - almost twice than the SuperSport's at that speed.
I'm looking to buy a bike this weekend in fact and this is one major candidate. However, I will have to ride it first. I'm used to a GSX-R 750, and comfortable on a GSX-R 600, but don't necessesarily need all that power. Am I in for a big let-down with the 650R in terms of performance?