Although the 270° crank concept has been attributed to Vincent Motorcycles' Phil Irving, the TRX was the first production motorcycle to have this design. The 270° crank has an ignition sequence and an engine balance that yields something of the feel of a V-twin.
Although the 270° crank concept is credited to Vincent Motorcycles' Phil Irving, the TRX was the first production motorcycle featuring this design. The 270° crank possesses an ignition sequence and engine balance that provides a V-twin-like sensation.