My 2001 FXDX developed a bad leak coming up from behind the inner primary. I replaced both seals, (starter shaft and transmission shaft seal). This didn't even slow it down. I give up and took the bike to the local Harley shop for repair. (The bike is 3 months out of warranty) They claim Harley is having a problem with some of their inner primarys being too porus. They claim some of the castings are so porus that the oil actually soaks thru the casting. Seeing that I have a 15 year old evo that the inner primary has never leaked on I was a bit disappointed in the twin cam. Has anyone else experienced this problem??? If so, is their a good after market inner primary a guy could buy to fix the problem?????