I used a coat hanger. Cut the hook off, straightened it a bit cut 2 pieces of tubing about 1/2" long each, punched small holes in the side of both and threaded them both onto the coat hanger. Next I adjusted the deflection on the drive belt to spec. and then measured the distance from the center of the swingarm bolt to the center of the wheel axle by sliding the 2 tube pieces to mark both spots on the belt side. Then I used this distance to measure the other side to match this distance at the same spots. Then I tightened the axle nut to spec. and cotter pinned it. double checked the measurements again and drive belt deflection again too.