The bolt on the sprocket seems to have fixed the chain issue. It's still as tight as it was when I put the bolt in the sprocket. Also tried a 90 jet in the stock carb and it bogged down at top end of each gear. Went with a 94 and its running better. Could probably get away with a 97, but I don't feel like taking the carb off anymore..
Also, my back tire has a screw in it...so, yeah.