Apples and oranges! GSX650F is NOT a GSX600R, it is the replacement to the Katana (and a damn good one). It got rave reviews in the press. Not really a direct competitor to the FZ6S2 - more to the FZ6R/Diversion. I also could not get over the size of the exhaust, but that could be replaced. Anyway, after a year and 4k miles am very happy with the FZ6S2. That being said, would love to have a nice long test ride on the GSX650F.