Wattie wrote:z1000s are quite a bit de-tuned, cams, crank, heads. about 20-30HP down...
When they tested one in their Green Issue from a year ago, Performance Bikes got 123bhp out of a Z1000 on a dyno. When they did the big-bore group test in 2002, the ZX-9R-F1P they had on test laid down 118bhp.
They use the more conservative DIN correction factor, but the relative figures are telling.