A new Triumph motorcycle with a 350cc engine has been spotted at dealerships. The bike is expected to be part of the Speed 400 range, but its exact name and launch details are unclear, with some reports suggesting an April launch and others mentioning a different model, the Bonneville 350, with a September launch. Additionally, there are reports of a broader shift in the Triumph 400 range to 350cc engines, but the specifics are not certain.