The right side reveals the Ducati-Desmo-style cover for the bevel drive system that operates the camshaft.1999 W650
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 decended, with modifications, from the BSA 650.[citation needed]
The W650 has a long-stroke engine of 72mm bore x 80mm 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 72mm bore with a short-throw crankshaft to give a 49mm stroke and 399cc (24cuin) 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 50hp (37kW) W650 was succeeded by the W800, which had a displacement increase to 773cc (47cuin) and fuel injection.
"Motorcycle Museum". Corporate Kawasaki. Canadian Kawasaki Motors Inc. Retrieved 2 August 2013.
Spannerman (13 December 2011). "Test: Kawasaki W400". Motorcycle Trader. Archived from the original on 5 May 2013. Retrieved 2 August 2013. By changing the crankshaft and conrods, Kawasaki converted the 650’s 72 x 83mm bore and stroke to an engine with the same bore but a stroke of just 49mm.
"W400" (in Japanese). scs-tokyo.co.jp. Archived from the original on 22 January 2013. Retrieved 2 August 2013.
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