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 is associated with Vincent Motorcycles' Phil Irving, the TRX motorcycle introduced this design feature. The 270° crank has an ignition sequence and engine balance that offers a similar experience to a V-twin engine.