About 3k ago I installed new drive which included an OEM front sprocket and RK 50 XS01 chain. I've recently noticed a new sound which seems to be each chain sideplate contacting the thick shoulder on the front sprocket before the chain rollers bottom in the sprocket. Around the entire circumference of the sprocket "shoulder" are contact marks where the chain sideplates touch. These marks aren't visible in pictures of a new Honda sprocket so I'm assuming they have been caused by the chain contact and something is not right. There's no other improper wear or performance. So is this normal for some reason or do I possibly have a faulty sprocket or an RK chain that's not compatible with the Bird's drive for some reason? Any suggestions or insights would be greatly appreciated.