To the best of my understanding, I have not had an issue with this.
However, I'm struggling to identify the marks you mentioned in the photo above. I have included a photo of my sprocket that was changed as part of the set at 20,000 miles. I'm the original owner.
Also, for the first 10,000 miles I'm pretty sure that the rear tire wasn't properly aligned. I didn't bother with it upon delivery. Started noticing that the axle was not paired up on the alignment marks on the swingarm. After the dealership performed the 600 mile service, which was supposed to include a chain slack adjustment, I noticed that the axle was nearly the entire width of an alignment mark off. Possibly they adjusted it on the chain side only. Assumed they knew what they were doing (mistake?) and I left it be. After changing the rear tire at 10,000 miles I got a chain alignment tool (no very cut and dry). I've also used a sag measuring slide rule to confirm the distance from the center of the swing are pivot to the center of the axle on both sides. With the slide rule measurements within 0.5mm of each other the swing arm alignment marks are matched up fine. Most likely those first 10,000 miles the rear wheel was out of alignment, which may have adversely affected the rear sprocket.
Let me know if you are interested in additional photos...(maybe closer if you can't download and zoom)
Last edited by Grimmer; 07-05-2019 at 05:05 PM.
Reason: Added photo of the other side.