I wonder how sturdy the case is in that area. Originally the chain was trying to pull the sprocket to the rear - now it will be pulling down on the sprocket. Same thing could apply to engine mounts - a lot of times they are designed to be loaded in a certain manner. Change that and the strength suffers.I had a friend ask how I did the chain, I just notched out the case and let the shifter rod come out the center of the chain.