"Kid killers", the power plant wrote speed checks the chassis couldn't cash, but a ton of power for the price.
I had the optional gearing installed before I took possession of it, which could produce 0-60 in 3.9 seconds, and 12.9 seconds in a 1/4 mile. It was fast! And a whopping $995 OTD! It did 125mph according to the speedo. My buddy's 750 Triumph Trident said 127mph side-by-side. One could not pull away from the other, although I could pull him at any speed under that.
Yeah, the frame, suspension and brakes weren't all that. But in a straight line it was the fastest production bike in 1969.
I was sitting at a light one evening when tw0 sporsters pulled up in the other lane. The guy closest looked over at me and said "ring ding ding ding", being a smart-ass. He had no idea what he just started, I reved the motor a couple of times and it said ring-ding-ding! I just smiled. The guy was good, took off burning rubber, but I went past him on the rear wheel within 50-75 feet of the start. At the next light the guy was silent, but took a long look at the Kawasaki that had soundly smoked his ass. I could see the gears turning in his head as he slowly shook his head in wonder. That would not be the first time someone took a long look at something they had disregarded as not worthy of attention just moments ago. I never lost a drag race on that bike, NEVER. The 'fabled' CB750 Honda wasn't even close. I know, I raced a couple of those too. The 750 Norton Commando was close, but only close.
My 500 was the 498th production bike off the assembly line.
At times it would get a slow wobble at speeds over 90mph, especially with 2 up. By 90mph any race was already over, and that took only a city block to get to. The 70 and later models were detuned although I don't know what Kawasaki did to induce that. A buddy had me try out a 71 500 he wanted to buy, the thing was a dog compared to my 69, but still pretty fast. One thing they changed was the capacitive discharge ignition system, they went to a points setup, dumping the 3 pole distributor. Probably saving money.