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Honda's strangest engine ever built had oval pistons

Of all the innovative and weird experiments bike manufacturers carried out in the '70s, this Honda engine experiment stands ...
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MV Agusta Built a 5-Cylinder Motorcycle Engine That's a Trapezoid?

MV Agusta quietly debuted a concept engine at EICMA to little fanfare, but it's a wild 5-cylinder square/trapezoid engine that could likely make production. I'm a fan of weird engine designs, much to ...