I had the honor of riding here in OH (Route 555) with a gentleman in his 60's now from UK who had raced the TT many years back. I wish we had time to chat but he had to cut the ride short as the bike he was riding (loaner) was a 1987 or so old bike with a 30 year old tire lol I remember before I even knew who he was I was riding behind and looking at his posture and how he was kicking everyone's arse that he was a pro. and upon stopping for conversation, it turned out i was right. He was some riders uncle or something for a short visit here. he was happy to see a few of us riding a Triumph
My question is - do they memorize the route ? I mean how can one have such a quick reaction? huge kahuna's.