If you have 25,000 miles on 2008 R3 Classic and you are switching to Progressive fork springs while replacing fork seals due to a leak on one side what other wear parts should be replaced? Thank you.
The only other item that I think you "may" have to replace is the bushing (item 12). But you have so little miles on your bike; it's doubtful at this point in time.
But if he has a leak, may not hurt to replace the bushing, even though it's likely not a cause of the leak. If it's replaceable and affordable to do so while you already have it all pulled apart, might as well.