Straight-three engine

A crankshaft angle of 120 degrees is typically used by straight-three engines,[4] since this results in an evenly spaced firing interval.

In 1980, Suzuki began production of a 543 cc (33 cu in) four-stroke engine, which was introduced in the Alto and Fronte models.

[7] It uses an unbalanced flywheel to shift the inherent three-cylinder imbalance to the horizontal plane where it is more easily managed by engine mounts, and so remove the need to use balance shafts.

In addition Triumph makes the Rocket III model, various variants of which have held the record for motorcycle with the largest engine displacement.

[26] In 2019, the Moto2 class in the MotoGP World Championship switched to using Triumph 765 cc (46.7 cu in) triple engines.

The straight-three layout is common for diesel tractor engines, such as the Perkins AD3.152.

This engine was used in the Massey Ferguson 35 and Fordson Dextra tractors, as well as for marine and stationary applications.