Thanks for the reply everyone, I did take everything back apart yesterday and tightened the slack in the chain to about a 1/2" , re-aligned the sprockets. I had some 1/8" washers made today at the shop and put one on both sides of the 10 tooth sprocket and I did a test ride again today, with a successful ride, I didn't have any mishaps with the chain breaking or smacking the plate and driven pulley.