- Feb 7, 2010
A frame designed for a 55 hp single cylinder in a 350-lb package was a little sketchy with an 80 hp 4-cylinder in a 500-lb package, not to mention a 140 hp Superbike racer of the day. Nobody knows those limits until they're exceeded. The MkII version of he big KZ had the frame issues addressed at the factory.I would have to disagree on that statement. the frame needed bracing in several places. if you put on an oversize rear tire or tried to push it near its limets it got pretty nasty.
But if you look at all the large- and medium-displacement steel framed Japanese bikes of the era and don't see a twin-loop cradle, I don't know what you're looking at. Until aluminum frames came into vogue, some version of the featherbed was it.