I removed the pistons from my 04 Sabercat 600 EFI today. When I removed the Rt side, there were washers on either side of the needle bearing at the connecting arm. When I removed the Lt side (Clutch side) there no washers. They did not fall out, they were not there. First time engine has been apart since factory. Parts list call for 4 total. Thoughts? Are they required? Any help would be greatly appreciated.