I have a white plastic washer that has a raised center (it's like two washers that are different sizes formed together with the same diameter opening). I am rebuilding a 2006 Kawasaki KFX400 and I found washer on the ground. No idea where it goes. It is about the size of a nickel. Found washer near the rear part of the bike after removing all major components. None of the major parts of the bike were disassembled. Simply replacing frame and transferring parts. I believe the part belongs to the bike, just can't figure out where it goes. Anyone with ideas or who knows where it belongs, please let me know. Went to a dealer and they have no clue. No pictures to share now but I can get them. Thank you in advance.