Originally Posted by YetiGS
I had this exact problem on my XR650R once. (It didn't have a cotter pin either fwiw.) I stuck one of my tire irons through the wrench hole in the other end and used it as a breaker bar and stepped on it with my boot. No worries.
Ah, I see it now. Think I have the same 17/24 wrench you'd described, and that tarh iron trick sounds, well, trick! Thanks!
Oh, and we must move in the same social circles. My "friends" describe my head in the same glowing terms. :)