Back in the 80´s I bought a brand new GPZ550 black and red. This is by far the best bike i ever owned. I abused this bike at the track, and on the streets, this bike never complained and never broke down. When the motor got a little tired, the Danners down in South Texas suggested i put a 615 Kit into this little monster. Well i did that, geared it down and put smoothbores on it - what a rocket! I would race people for money and they could not believe how this thing ran, I´m talking about 600 Ninjas, kz 750´s I even ate my friends 750 triples lunch. I love Kawasakis! I wish I never would´ve sold my bike.