ParallelTwin

A 250-class sports machine combining a 247 cc air-cooled two-stroke parallel twin with a six-speed gearbox. Developed with European and American highway riding in mind, it was sold in Japan as the Colleda 250 T20, in the United States as the X6 Hustler and in the UK as the Super Six.

Yamaha's first model with a four-stroke engine, after making only two-stroke machines since 1955. A slim 653 cm³ OHC vertical twin in an equally slim double-cradle frame answered the brief for a light, slim and compact large-displacement sports bike. Fans nicknamed it "Peke-S".

A 1980 pure sports model built around a liquid-cooled 247 cm³ two-stroke parallel twin. It combined Yamaha's Monocross rear suspension, lightweight cast wheels and styling reminiscent of the TZ250 racer.

A 250 cc liquid-cooled two-stroke parallel-twin sports machine launched in March 1983. With a half fairing, an aluminium square-tube double-cradle frame, Full-Floater rear suspension and a 16-inch front wheel, it weighed 131 kg dry and produced 45 PS. Suzuki regards it as the pioneer of the racer-replica era.

A 1985 racer replica drawing directly on road-racing technology. Its liquid-cooled 249 cm³ two-stroke parallel twin used crankcase reed-valve induction adopted from the YZR500, set in a light, rigid aluminium Deltabox frame with 17-inch wheels front and rear and large floating disc brakes.

A maxi-scooter introduced in 2001, powered by a liquid-cooled 499 cm³ DOHC parallel twin driving through a V-belt CVT. Early models used a tubular steel frame. Specifications listed are for the 2001–2003 model years.

A 2019 adventure model with a liquid-cooled 689 cm³ parallel twin with a 270-degree crankshaft in a lightweight chassis. It balances off-road ability, adventure riding and touring, with freedom of riding position, durability, serviceability and luggage capacity. According to Yamaha, it is about 10 kg lighter than its XT660Z predecessor.