Originally Posted by Hank.SD
Yup! Last year I bought a WR450 with a 1/2 used up oring chain on it. At the same time, my buddy bought a WR426 and put a brand new high end non-oring chain on it. By the time he blew up his 426 (maybe 60 hours of riding), my oring chain was probably at 30% left, and his new non-oring chain was toast. Nearly every hour on the bikes was put on side by side. I see no reason for the existence of non-oring chains at this point.
An 0-ring chain can seem stiff when its been sitting,once its warmed up from riding they flex just fine. Ive gone many rides with a good o-ring chain with no adjustments needed,hence the sprockets last longer.