Well to see feedback again in AMCN this week, with the points raised on how really much of a ho ha there is with effect of learning and riding a big bike straight up is over capping people on a 250cc. The key, and stress key factors in all self-generated motorcycle operator deaths and injury is riding outside your abilities and as quoted from AMCN "young person ego syndrome". Another good point raised is that one should always have equipment that is more capable than themselves, especially when it comes to handling and road dynamics. As we have seen a spate of 250cc learners done for hoon law infractions, and numbers of cage drivers pumping mum's astra to 160kph down suburban roads. Vehicle power and saftey, all comes down to the rider. Hell you could done for hoon laws on a scooter in the right speed zone. As far as causing accidents, 250 or 1000. The damage at legal road speed is identical. If anything speed is the critical factor in damage. (Basic physics, E=M*(V*V). Hence, double the speed, quadruple the energy of impact. Before one says, yeah but a 1000cc can do 250kph +. Remember, we are taking about machines in the hands of reasonable riders, obeying the law. If not, then all is pretty academic!