I just put a new clutch in my 2000 Savage.  I've seen new clutch plates for sale on ebay supposedly only for 2005 models.  I couldn't find any differences between years so I took a chance and bought one off of ebay for the  2005.  It is in the bike now and working fine.  That said, I did see a difference.  Normally Savages have 5 disks that are the same, and one that has a larger I.D. so there is room for 2 "wave washers".  The one I got off of ebay had 6 identical plates.  I left the 2 wave washers out and put in the 6 identical plates and so far it seems to work fine.  I'm not sure what is the purpose of the wave washers.  I've put clutches on other motorcycles and they didn't use them.  I assume it could help prevent chattering, or possibly it helps keep the clutch from sticking when it is cold.  My Harley clunks loud putting it into 1st gear when it's cold because of this.  Anyone have an opinion on this?

The price of the clutch plate set on ebay is about $28 and everywhere else wanted $50-60 for one.  So it's a good deal if anyone needs a clutch.  Even though it says it's only for 2005, it seems to work fine.  Interestingly enough, the ad says for 2005 Savage (not S40 as they are named in 2005).

My bike has about 15K miles on it.  I mic'd the old plates and they were about .002" shy of being at the minimum limit, so I figured that since I had the bottom torn apart to replace the cam chain, I might as well replace the clutch while I was at it.  I didn't think to measure the new plates with a micrometer, but it went together fine and didn't look like the clutch pack was any thicker than original.

- Jim