On our "Then & Now" day in the sun, there wasn't a bigger contradiction than between the Z1 and its great-grandchild, the new 2010 Z1000. Kawasaki turned the engineering train fully onto the streetfighter tracks with the Z1000, producing an aggressive, ass-up-and-nose-down hooligan. Its quick-revving 1043cc four is worlds apart in character from the old Z1, and its appearance is out of another time-space continuum as well. In a word, the new Z1000 is a superbike without the bodywork. With a tiny instrument panel, steep fork angle and frenetically revving engine, you almost feel like you're due for a nosebleed when riding it. That is, until you enter the powerband and get thrust into the next time zone, sprinting down the quarter in under 10.6 seconds at a sizzling 131 mph.