Reply To: Normal? January 30, 2019 at 1:59 pm #3286 TCParticipant It won’t do that so much in warmer air. Cold air is denser which creates a lean fuel mixture = hotter running. This, in addition to thin single wall header tubing and you’ll see it glow. These engines are tuned to run lean from the factory anyway to meet emissions standards and the cold weather is making it leaner. If the bike is running it should also be moving.