Introduced in October 2015, the Speed Twin 900 is assembled in Chonburi, Thailand, and is the successor to the Bonneville SE.

[3][4] The Speed Twin 900 offers a two-cylinder in-line four-stroke engine that has a displacement of 900 cm3 (55 cu in), equipped with a liquid cooling system, and it runs on a multipoint electronic injection system, producing a maximum power of 55 hp (41 kW) at 5900 rpm and a torque of 80 N⋅m (59 lbf⋅ft) at 3230 rpm, which is bolted to a 5-speed transmission with front engagement.

[5] The Speed Twin 900 is built on a steel frame, and it is mounted by a 41 mm telescopic fork protected by bellows and a double-sided swingarm at the front and rear respectively.

The Nissin braking system consists of a single 310 mm (12 in) disc system at the front with a two-piston floating caliper, while at the rear a single 255 mm (10.0 in) disc always with a two-piston floating caliper; both of them have ABS as standard.

[6] In October 2018, at Intermot, an updated version of the Street Twin was presented, not only in terms of chassis but also mechanics.