Responding to this tempered response among the public, Kawasaki launched two powerful rotary-valve motorcycles, the Samurai and the Avenger, which became hallmarks of the company's commitment to ...

The D1 100 was equipped with a rotary disc valve engine and was made to be a workhorse. This engine was used for a long time ...

The many decades in the motorcycle industry have given Kawasaki ... The bike was powered by a 247cc, twin-cylinder, two-stroke, rotary-valve engine that produced 31 horsepower.

A report from TopSpeed has us musing about the future of the motorcycle community when it comes to rotary ... With Astron’s new brainchild, we’re looking at four, with a rotary disc valve sitting ...

The two-stroke, ‘square-four’, rotary-valve engine was built purely for ... Co-Founder and President of the Motorcycle Design Association. Buell had tried to meld two worlds together: that ...

Motorcycle builder Ducati is no stranger to ... The record-breaking quad-valve 659cc unit has no conventional valve springs but still manages to crank out 77.5 horsepower at 9,750 rpm with a ...