I have had mine for over 2 years. If I did open it up, which I did before I installed the Tri-Spark, I cleaned the sprague with Brakeclean and then packed it with an ultra tacky grease. When I got the kit, I asked Paul at Alton what about lubrication for the sprague and he said that if the chain case cover is off, spray some dry lube into the two holes (that are used to put it out). Sadly Paul is not with us any more and I remember him as very committed to and supportive of the product.