The dealer show is in Vegas in June, that is where Yamaha is supposedly going to announce their aluminum frame. But does anyone really want an aluminum frame? overly rigid, perimeter frames are not all that they are cracked up to be, in my opinion. i also think that the weight savings is not going to be that great. the 2-stroke shaved 5 pounds not only because of the frame, Yamaha also took weight off of the swingarm and changed some fasteners around. According to Dirt Rider, the Yamaha 250F has the best motor and suspension of all the 250 thumpers. So why does it need to change?