New ,so help me out. I bought a 1986 Yamaha BW 80 complete frame. I have a PW 80 complete motor. Installed and all went well. Problem !!!! PW 80 motor drive sprocket is short to line up with Big Wheel drive wheel sprocket. Has anyone done the conversion without splitting the cases and replacing the Pw 80 drive shaft with the original BW 80 shaft? Kinda weird but is there a way to make a jack0shaft to extend the sprocket line up? Thanks I hope someone see this.