Thats what I did. My bike chain was too short so I added a link to lengthen it so I could have both chains at about the same tension. Now without the tensioner to guide the chain the chain is thrown off the srocket. Funny thing is its not that far off, I mean really, a "skosh" is all. gnats hair, but its just enough. I am gonna get a spring chain tensioner and put that on to see if its enough to guide the lower part of the chain into the rear sprocket. what do you think of this issue? that link is a picture of the bike.