I just received a call from my brother who is at the dealer show in LasVegas. The 06 YZ250f and 450F will be on aluminum frames. The 450 will be an all new motor. There is also an electric start ttr50 and GYT-R has big bore kits, exhaust, suspension components, etc. already available. There will also be a special edition 250f and 450f with the "Hurricane" style graphics and yellow plastic.