Is the Triumph Tracker 400 good for highway touring?

Yes, but with a few compromises. The engine is smooth and cruises comfortably at highway speeds, making short and medium-distance touring enjoyable. However, the flat-track styling means there is very little wind protection, so riders will feel noticeable windblast above 110 kmph. If you regularly tour long distances, the Speed 400 may feel slightly more relaxed.