Kawasaki will sell you the 650 X2 manual for the 650 SX. I went through this with them because I ordered a service manual for my 650 SX back when I had one. Well they sent me the 650 X2 manual. I was ticked because I already had a 650 X2 manual and had to pay return shipping and restocking fees for their mistake. They could have better labled the info on the manual!
Kawasaki also sold, best bet is eBay, a "supplement manual" for the 650 SX which covers everything else not found in the 650 X2 manual specific to the 650 SX. I had one but sold it on eBay years after selling my 650 SX. I haven't seen to many of these "supplement manuals" around on there anymore. Don't be confused by the "owner's manual" it doesn't contain much of the same information. Although the two manuals are about the same thickness.
I will post a pic when I get home of the manuals, I have it saved from when I sold it on eBay.
However, I can offer you guys a pdf of the 650 X2 manual. Just PM me your email addresses.
DBR