I put back on a 8DN-00 used belt,it was 1mm down on width..shimmed secondary with 1.5mm washers to get belt hieght right.Took her out on the river and only could get 95 at 8500 rpm.Went home,put 8DN-01 back,used a really thin washer(less then the .5 ones) to get belt height.It may have squealed one or twice but was good.Took it out to the river and was hitting 103 this time at about 8600-8650.slightly higher rpm's..So the belt seems to work,mind you the used belt was 1mm smaller in width,so that could of caused some loss in speed.I think the 01 belt is fine then..