FE/FC FE 501 Chain wearing into frame

2014 FE 501 with 3800 dual sport miles on it. Mostly 13/49 gearing if riding tight trails, sometimes I put on a 14T if I'm doing open fast trail riding. I just rode 9 days straight at the ADV rally in Wisconsin and after getting the bike home and cleaned up I noticed that the drive chain is wearing into the frame where the subframe meets the frame. It's relatively minor and I'm not 100% sure it wasn't like that from the factory but I'd guess it happened from the chain slider being worn and the chain slapping the frame. I knew I was due for new drive components so I ordered a new RK chain, OEM chain slider(upper and lower in blue), a blue TM chain guide and new sprockets and bolts. I wanted to pass this on to owners to keep an eye on this area. My chain was needing to be tightened after everyday riding so I knew it had given up the ghost but was milking it. The wear seems nominal and looks like it was ground out with a die grinder. Here's a crappy picture of the area involved. It's a mess in there with chain lube on the plastic subframe hopefully you can see the area wearing. There is about 3/4" between the chain and frame so it's hard to believe that the chain can actually deflect that far to contact the frame especially that close to the counter sprocket.

I was going to say chain is slap wore out.... but see you knew that....

Ya I was pushing the chain and drive components like a dummy. New stuff is coming tomorrow so she'll be all spruced up by the weekend. I'll prolly pull the swingarm, inspect and grease the bearings while I'm at it. The linkage should get some love too. I should just buy a 2016 and be done with it. Lol

Wholly worn chain slider batman! My new parts came and lets just say, ya, it was worn...
Apparently it's not supposed to have 3 grooves? Chain guide was thrashed as well. New TM one is replacing it.