Zion National Park was already getting crowded by the middle of June. We did find that getting there around 0800 seriously reduced the traffic and congestion, but the main park is still too busy for a contemplative ride. As we crossed it west to east, we happened upon a couple of other motorcyclists, one on an HD with the obligatory loud pipes. As we slowly made our way through the 1.1-mile-long tunnel about a quarter of the way through the park, this fine fellow seemed to have trouble with his engine. I guess it wasn't carburating quite right as he had to keep pulling in the clutch and revving it up every 30 seconds or so. If there hadn't been so much traffic, I would have stopped and offered to help him tune it properly...