Motion Pro has an easy solution to replacing your 2-stroke throttle housing with the Vortex throttle assembly. The Vortex throttle assembly has been constructed out of die-cast aluminum and left with a gray finish and gray rubber mud cover. Motion Pro designed the Vortex throttle assembly to fit 7/8" bar diameter. A 2-stroke nylon throttle tube is included with the Vortex assembly. The throttle tube also features a pop out end for hand guard mounting. Note: the Motion Pro Vortex throttle assembly will fit: KX125/250 92-05, RM125/250 95-05, YZ125/250 96-05, and WR250Z 97. The Honda CR125 93-03, CR250 90-04, and CR500 90-01 require the Motion Pro Vortex throttle cable.