I rode a 600r for about 3 years, had trouble keeping up with supersports until i put on the d&d exhaust, jet kit, and -1 front sprocket. It uses the fzr600 engine, with a milder seating position. Handling is pretty good with adjustable suspension front and rear. If you could get it cheap enought it would be worth it, especially going from a cruiser to a sport bike, but with the price of a lot of the newer used bikes i'd go with one of them first but don't think you'd be dissappointed with it since it is a YAMAHA