The stress across a surface element (yellow disk) is the force that the material on one side (top ball) exerts on the material on the other side (bottom ball), divided by the area of the surface.
Overview. The WR450F retails for $8,290, making it the sixth-most expensive 450cc 4-stroke enduro bike of 2013. It comes equipped with a 449cc engine, which is slightly larger than average for a 4-stroke motor.he WR450F retails for $8,290, making it the sixth-most expensive 450cc 4-stroke enduro bike of 2013.
Our test car was the Premium trim, which brings 18-inch wheels and performance tires, heated front seats and mirrors, and an upgraded infotainment system for $2300 more than the base WRX, pushing its starting price to $30,155. Add in the Performance package and youâre looking at $32,205.