Need Help with Big Sprocket

[Ed Law]

Thank you to all your suggestions. All of them are possible solutions. Based on the amount of time left, this is what I am going to do. Jim Zondag came to the rescue again with this idea. It is similar to what Wayne suggested. I have a motor attached to the driving sprocket at one corner to turn the big sprocket. I am going to put an idler sprocket on the opposite corner to pull the chain out to reduce and split the number of teeth engaged into less than half of what it used to be. I will also mount this idler sprocket on something that has a slot for adjustment until the chain sits properly on both sides. This seems so simple and elegant. I learn something new every day.