I wanted to just say that I stuck it out 10k on my 44mm Showa forks and was not very happy from the start. I had the clunk and got that fixed up. Then one leg started to leak at the seal a little. Enough that it would have a ring of road dirt where the fork seal would deposit it a few inches above the seal at rest.
I dumped that foul looking oil and installed a new seal, but in the process, I went by the book and measured carefully the recommended height of oil in my forks with the HD type E fluid. It takes a lot of oil, in fact I had to buy four bottles of it to fill to spec and have about a pint left over. Then after a test ride, I could not believe the difference. Everything seemed to work very well. A new front Dunlop and I cannot see any unusual wear at all after more than 5k.
I chalk it up to either the measurement of the oil that came in the forks or the oil itself. It is possible that original oil is Japanese fish oil, it did not look good. I wish I had measured the oil in each fork leg before installing new seals, but I just dumped it all out in a pan and after the fact wished I had, so I could know just what it was that made the action of my forks feel mushy and cause the tire to get choppy. Another thing I did not do was check the balance. I just had a new tire installed and balanced, but never checked the balance on the original tire to see if it was out. I keep my tire at recommended 36 psi too. Isn't hindsight great? :14:
So, Forgetful1, you could check the fork oil and the tire balance itself.