It is definately sounding like your belt deflection is a tad tight. It should, as previousely stated, loosen up as the belt breaks in. However, Do you have the updated deflection adjusted from cat. If not, make sure the deflection adjusted has not backed out a bit. I know mine did. If you can, open your secondary sheaves a bit and attempt to tighten the adjuster making sure it's fully seated. Then start your sled and spin the track for a quick second. The secondary will close and you can see if the problem is resolved. This was a common problem, thus the update was created.
S.C.