When I swap a rear wheel onto a different bike, here's what I do. Measure from the centerline on the old wheel to the back side of the drive sprocket. This measurement needs to be the same on the new wheel. So you might have to machine the cush drive in or space the sprocket outwards. Next step is to place the stock wheel, with the cush drive and the outside left spacer in place, on a work bench. Then put a straightedge across the top outside edge of the spacer and measure again to the centerline on the wheel. Your new wheel with the cush drive and spacer will need to be this same measurement. Usually this is adjusted by putting in a larger or smaller spacer. Lastly, insert your new wheel, cush drive and left spacer into the swingarm and simply fill in the blank space on the right side of the wheel with the appropriate sized spacers.
TR
