trying to think logically, the tension on the belt should be the same all the way through the range of the shocks with regard to the swingarm pivot location. it should not change.
as for the tension of the belt, by taking hold of the belt between the sides of the index fingers and the thumbs, you should be able to rotate the belt longitudinally no more than about 75*, or from a straight line from pulley to pulley no more than 3/8 inch deflection.
(i think)
