The Kawasaki W650 is a retro standard motorcycle marketed by Kawasaki for model years 1999–2007 and superseded by the Kawasaki W800.

Kawasaki W650

2000 W650 in "Galaxy Silver/Luminous Boralis Blue"
Manufacturer	Kawasaki
Production	1999–2007
Successor	W800
Class	Standard
Engine	676 cc (41 cu in)
Bore / stroke	72 mm x 80 mm
Top speed	180 km/h (110 mph)[1]
Power	50 hp (37 kW) @ 7,000 rpm[1]
Transmission	Chain
Wheelbase	1,455 mm (57.3 in)
Seat height	800 mm (31 in)
Weight	195 kg (429 lb)[1] (dry)
Fuel capacity	15 L (3.3 imp gal; 4.0 US gal)

The "W" in "W650" refers to Kawasaki's W1, W2 and W3 models, manufactured between 1967 and 1975.^[1] The "650" refers to the engine displacement.

In 1999, superseding the Zephyr series, Kawasaki introduced the W650, resembling British motorcycles of the early 1960s, notably the Triumph Bonneville.^[1] The engines of the British motorcycles used pushrods, but the W650 has an overhead camshaft, driven by bevel gears, in the same way as 1970s Ducati singles and V-twins.^[2] The W650 had no connection to Triumphs. They directly descended, with modifications, from the BSA 650.^{[citation needed]}

The W650 has a long-stroke engine of 72 mm bore x 80 mm stroke with an anti-vibration balance shaft and modern electronics. In 2006 Kawasaki added a short-stroke W400 model, in Japan. Kawasaki simply combined the same 72 mm bore with a short-throw crankshaft to give a 49 mm stroke and 399 cc (24 cu in) displacement.^[3]

In the United States and Canada, the W650 was imported for model years 2000-2001. With weak US and Canadian sales and the introduction of the competing "retro" Bonneville by Triumph, Kawasaki concentrated sales in Europe and Japan.^[1]

Production of the W400 and W650, unable to meet new emissions standards, ended in 2008.^[4] In 2010, the 50 hp (37 kW) W650 was succeeded by the W800, which had a displacement increase to 773 cc (47 cu in) and fuel injection.