Quit your belly achin ! The horsepower numbers are the same and the 125's are lighter ! Get the dam factories to get a decent powerband out of the dam two strokes ! Yamaha had a good engine last year and screwed it up by adding a biggger carb thus losing bottom end. Even power ,the four stroke way. Get used to it people, the dam bureaucrats are going to drop the hammer sooner or later on the two strokes.