[101lifts2]

I cannot really see from the picture, but are there 4 threaded holes in that sprocket? If so, then you use a puller in which all four bolts are threaded into the sprocket and are bolted to a plate some distance away from the sprocket. Then a center threaded bolt, which is threaded into the plate goes into the hole to push on the crankshaft. When this happens, the sprocket is drawn away from the crank. If there are indeed holes, you would have to make a special tool specifically designed to remove this thing.