it's a new belt. it will stretch some, then wheel swaps will get easier.
when i upgraded to teh 04+ belt and pulleys on my XB, i hade to have the wife squat on the pillion to compress teh suspensionenough so i could start the axle threads.
my 1125 was SUPER tight on the stealerships floor, but 6k mi later it has realxed a bit.