I am installing a Rekluse Pro on my 2006 YZ450F. Page six of the Rekluse install instructions mention installing the "external tab lock washer AND flat wash washer" on the main shaft. I did not receive a flat washer nor was one listed in the included parts list. There was no flat washer as part of the stock setup either. Has anyone run into this? I have a message into Rekluse support but haven't heard back. Just thought I'd check before throwing a generic washer in there.