Which motorcycle manufacturer uses engines with a desmodromic valve design?

Harley-Davidson
Yamaha
Ducati
Honda
A desmodromic valve is a reciprocating engine poppet valve that is positively closed by a cam and leverage system, rather than by a more conventional spring. The main benefit of the desmodromic system is the prevention of valve float at high RPM. It has been applied to top-of-the-range production Ducati motorcycles since 1968.
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flagGermany
40%
6%
53%
0%
15
flagPoland
36%
17%
36%
9%
2010
flagthe United Kingdom
45%
10%
30%
15%
20
flagthe United States
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25%
29%
20%
24
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45%
20%
20%
12%
24