RAKE ANGLE MODIFIER

The present invention provides a steering shaft changing device capable of securing the safety of vehicles without damaging a casted frame, and of changing rake angles by being mounted on a head of a two-wheeled vehicle. The steering shaft changing device comprises an upper block including a groove combined with a lower block on the top surface of the steering head and a through hole forming the steering shaft at an extension part extended to the front side of the steering head; an axle connecting the upper and lower blocks and penetrating the steering head; the lower block connected to the axle on the lower surface of the steering head and including an extension part extended to the rear side of the steering head; a wing bracket connecting the extension part of the lower part with the bracket forming the steering shaft, and formed by being extended to pass through the side of the steering head; and a bracket connected to the wing bracket and including a through hole forming a steering axis at the lower part of the extension part of the upper block. Provided is the steering shaft having a rake angle formed by the through holes of the upper block and of the bracket is larger than a rake angle formed by the steering angle.