I have a '22 model, found similar wear marks on the cover inside. Upon thorough cleaning of chain and cover I decided the cover inside has a peculiar design and much less worn than I initially thought. Also, the chain seemed rather stiff in some places, void of any looseness, showed no wear whatsoever. Nothing else out of the ordinary. All this around 2500 miles. I plan to check & clean regularly, address this item with dealer at service #2 if not sooner. Good luck.So like the title says, it appears my chain is rubbing the front sprocket cover on my ‘23 890 Adventure. It’s wearing grooves into the bottom and top of the cover, chain tension and alignment is perfect according to everything I can find online and in my shop manual. I clean and check chain tension religiously. Ridden mostly off-road since new, currently has 1800 miles on it, anything outside of the obvious I should be looking at? It seems like it happens primarily on deceleration.
I was going to drill out the holes just a little bit to slide the cover forward some more. I’ve got a Vanasche sprocket cover/ case saver on the way but thought I’d see if anyone has had this happen and found something out of the ordinary that I’m not thinking of. The dealership had the chain way way too tight when I picked it up, I’ve got it adjusted a hair on the tight side of the exact specs (I.E. 5mm clearance to the swing arm following chain tensioning procedure).