As far as I know the part number for the newest compensator is 42200064-A. The last one I purchased did not have the A, when I talked to the person handling my replacement for the one year warranty he is the one that noticed that it was already upgraded. I will know more once I have this completed. I purchased it through a mail order HD shop so I have to get some paper work in order to get the replacement. Mine was knocking at 7,000 miles as well but I managed to get it to 10,000 miles before I took it out. Bike is on the lift for the winter anyway. If the part number is not correct I will post it & send you a PM. I'm still planning to look into the Compusaver and change the clutch out to one that will let me use a slightly thicker fluid. I have been using B&M quick shift for some time. I'm also using the Dimple magnet for the Primary side and it has been full of metal & sludge every 3,000 miles. That little magnet will hold a 3 pound hammer while the stock magnet can't hold a small wrench. What I can't figure out is why many of us were able to get some decent miles on the original only to install the latest & greatest numerous times. Somebody must have an answer.