[kz1000st]

First off 10,000 miles on a belt is really up there. Mine was cracked and gnarly at 9,500 on my 250cc. Second, how many miles did you go in 6 months? A non-descript cheapo belt will only last about 2,500 miles. The metal bushing should be tight on the shaft but semi loose in the variator. The variator floats across it as the weights move out and push the variator towards the fan raising up the belt. Make sure your rollers are in right or the variator will wobble and create tight spots that abuses the belt.