Firing it up, it falls into that familiar, loping V-Twin gait. Yeah, we know what you're thinking, "it's a parallel twin, you moron!" but with its uneven crank pin spacing (270-degrees, as opposed to an even 180) it sounds and feels like a Vee. While the other Trumpets are known for unique power delivery, with a high-revving 865 in the smaller models and a savage 2300 triple in the Rocket IIIs, it's almost shocking how conventional the 1600cc parallel Twin in the Thunderbird feels. Triumph claims to have spent quite a bit of time on the sound of the bike, tuning out high frequency noise, while accentuating (to extent of the law) the down-low rumble. In fact, while the Brit-spec bikes we rode sounded plenty fine, the US models have even freer-breathing (louder) exhaust, due to looser regulations here.