Well i think the first thing im going to do is buy a $10 segment (I only need about 2.5 feet) of #41 chain to see if that remedies the issue. From what i can see, a #41 is a little bit wider than a 415 chain. That might be the real issue with it not meshing with the drive sprocket. I can check if that will work before even buying it, and if it doesn't, I'll already be at the gokart shop, so I'll just buy a different drive sprocket. I was pretty bummed out about Bikeberry's response to my issue. They DID respond, but this is 100% a manufacturing/packaging problem, and they wouldn't fix it. And suggesting that i file down the drive sprocket is very questionable. In order to maintain reliability, sprockets and chains should be a pretty precise mechanism, they shouldn't be force fit. Im going to call bikeberry off the number they gave me in the email and see if they can actually help me out lol. thanks guys for the advice and encouraging words, I'll be riding in no time!