I got the 8 tooth at this site
http://ombwarehouse.com/-40-41-Chain...h-AZ2182K.html
it is for a size 40/41 chain and it is smaller in structure. I would have rather had one for the 40 chain only, with about the same dimensions as the original sprocket, but it does work good and i am happy with it. The only difference between the 40 only and the 40/41 is the width of the teeth on the sprocket. The 41 chain has a little smaller width than the 40 so naturally the 40/41 sprocket teeth are not as wide as the 40 only. This is the only 5/8, 8 tooth, 40/41, c-hub sprocket I found for a reasonable price. They do have 40 only in the b-hub which I found at northern tool website. I also found a 40 only c hub on ebay but it was 4 times as much. I have the yerfdog 3203 which has the 40 chain, check and make sure what you have before ordering so you get the right one.
It does take off and climb a lot better now.