With my 2001 gsx 750 f the top speed was 255 km / h . With yoshi exhaust.with stock exhaust was 245 km/h .climbs 230km/h so easy. Horse power is more about the rev engine makes . İt makes 11500 rpm . Not like gsxr 14000 rpm . Thats why the engine life is longer .less power but the same torque .