you didnt need to replace it the old one was fine... the stock chains and gears seem to have a lot of slack which is fine as long as you dont have nylon coated gears! i,m doing mine right now also not sure what i,ll find under the cover! could you do me a favor and see how much slack is in it by sticking the T cover and balancer on [lightly dont need to bolt em down] and rotating it back and forth at tdc 0 DEG and see if its more than 10 degrees of slack either direction ..if the covers are on and your able to do it now doesnt matter would still give me my answer thanks dan
